Enforcing Loyalty has a potentially potent effect. It can trash any out of faction card in the runner's rig, Anything! But is it a good card? There are several points against it:

-Because of it's play cost, it is basically a trace 1 card. That is horrendously bad! You can bump it up by 2 for free in NBN: Making News which is a little more doable. Primary Transmission Dish could help too, but you'll need to protect it. You have to consider too, that more and more runners are wisely running with link. That makes it even harder to land this card. So to use this, you'll either have to catch the runner when they are broke or spend a good amount of credits.

-It's a double which just makes it more of an investment to use.

-It has a trash cost! And an extremely low one. That's right, this is one of the new breed of operations that can be trashed when accessed. This makes it vulnerable to being sniped out of your hand or R&D before you are ready to use it.

-It only targets out of faction cards. This would include neutral cards and so each deck does have a decent number of targets, but still far less than half of their cards will be target-able. And you won't know until you sit down and start playing which ones.

Now if you do catch the runner with no credits, you may be able to take out a vital, perhaps non-replaceable, part of their rig. You might target:

-A loaded Kati Jones.

-A criminals imported Corroder or Gordian Blade. They probably only have a couple and limited if any means of recursion.

-The console or other memory cards. This could be huge if they have a full rig, forcing them to immediately trash some programs. A Scheherazade or Leprechaun could have the same effect. Remember that any of these cards have to be out of faction though.

-Take out their Plascrete Carapace and then go for the kill.

-High cost cards like Femme Fatale.

As you can see, if you manage to pull it off, the effect can be devastating. Hence the many downsides to the card. It does only cost one influence so you can include all three of them in a deck easily enough. I think you could run a Midseason Replacements deck with Closed Accounts and a couple of these. Give em a bunch of tags, take all their money, then in the next couple turns take out parts of their rig. Of course if you pulled this off then you could probably just of Scorched Earth them.

Not sure what you're saying about Paperclip, as it has recursion built-in. —
ha ha yeah, not used to that yet —
switched to gordian blade —
regarding "basically trace 1" - this is effectively identical to Midseasons and SEA Source. —
True, but those cards are typically followed by game over. Enforced Loyalty is often just an inconvenience to the runner. —
It's not 'effectively a trace3'. It IS a trace 3. If you're the runner, you still look at this as a trace 3. —
Here's how I look at it: Say it was a zero cost trace 1. You'd think wow, that's pretty bad, I'll probably have to spend some real money to land this. This is actually worse than that. If it was a zero cost trace 1, and you happen to catch the runner with zero credits and no link, you could land this for free. If they have two credits, then you could boost it by two for a trace 3 and catch them again. You don't have that option with a two cost trace 3. As Runaway mentioned, this is actually common with trace operations (though you get a real bargain with Foxfire). Midseasons and Sea Source have a trace of only one more than their cost. But typically if you play those cards you follow it up with Scorched Earth for the win. In that case, any investment is worth it because you just won the game. —

I'm going to compare her to two other runners. Geist saves you clicks by giving you free draw. Kate saves you money by lowering the install cost of hardware/programs. Khan gives you both. A clickless install with the cost lowered by one. Sounds great and indeed it is, warranting her lower influence. Let's talk about the limits on the ability though:

-It targets only icebreakers, not hardware, not even other programs.

-It only can be used once per turn. Of course it'd be nice if it wasn't restricted in this way, but it isn't too big a deal. You will only have so many icebreakers in your hand. You probably won't ever be using this ability on the corporations turn, unless they were to play An Offer You Can't Refuse and you take them up on it.

-You have to pass a piece of ice in order to use it. As icebreakers are what normally allow you to pass ICE this could be a bit of a problem early game. Of course some ICE doesn't end the run; you could run through a Pop-up Window and get the install after. I think a good choice would be to include three Inside Jobs to help you get set up early game. It's just a solid card anyway. Other choices would be Rigged Results and Femme.

Of course in order to justify using her as your ID (and accepting the lower influence), you'll want to make full use of it. Just using a standard three breaker suite is not going to be using her to her full potential. Here are the best options I can think of:

-The first thing I, and I'm sure most others, thought of was the criminal suite of “one-shot” breakers, Crowbar, Shiv, and Spike. Any of them would install for free and there are a lot of them. Once you have a few of these and some other icebreakers installed, they are super efficient, costing nothing to get through ICE. Because of this obvious synergy, I was surprised when I realized that Khan doesn't come with any link. This is an issue. You'll either need to include enough link cards to make sure you get the two required link early or enough extra memory. Going the link route, I think including three Rabbit Holes would be the only reliable way to go, maybe a Toolbox too. Otherwise you may find yourself unable to install your myriad of breakers. This will unfortunately eat up a chunk of your precious influence.

-Golden is her signature breaker and would be a good backup to your Shiv. Use Shiv for the small ones and Golden for the bigger ICE. If you have an abundance of money and you are facing an Archer or Janus 1.0, go ahead and use its powerful but costly derez ability, then immediately reinstall it for four creds. We will have to wait and see if they release a fracter and decoder of like kind. If so, they probably won't be any more cost effective than Golden. Criminals are after all known for their killers.

-Other potentially good breakers would be Chameleon or Brahman. You'll need most of your influence but it may be worth a try.

By way of conclusion: Khan is just super cool, I mean, she has a digital falcon on her arm.

Link would have been nice. Even 1 link. It's her biggest problem. I'm sure the designers had a good hard think about that, though. —

Wow, ok, so I guess I'll start by addressing the obvious. This card is nuts for one reason in particular. It stops the Jacksonator. Corps beware! There are now two surprise ways for the runner to nab all the Agendas you've been chucking into archives without you being able to tuck them back into R&D. And this one is much more economical (Rumor Mill costs only one credit whereas Hades Shard costs 7). This is huge and will shake up the game for the foreseeable future. I expect to see this in many runner decks for quite awhile. The mere threat of it forces the corp to start playing a little differently. Corp players will have to start protecting against this card. This might include using Jackson right after discarding, ICEing archives more aggressively, holding onto more agendas in hand, or playing cards like The News Now Hour, Rework, Special Report, or Corporate Shuffle.

But wait! There is much more to this card than just stopping Jackson Howard. At this point, every single unique asset and upgrade is blank when this is in play (to date there are no unique regions). Some of the popular ones are Sandburg, Museum of History, Marcus Batty, Caprice Nisei, Ash 2X3ZB9CY, and Jeeves Model Bioroids.

There are a number or others, most don't see play but you may run into some of them. The executives won't work, but note that they won't go to your score area either if you trash them. Most characters such as Ibrahim Salem and Lily Lockwell no longer function. Then too there are a few upgrades that you run into once in awhile that Rumor Mill stops. This would include The Twins, Ryon Knight, and Keegan Lane.

So basically this is the new runner swiss army knife. It is the real deal. A card like Political Operative can potentially help you if you run into Ash or Caprice. But it takes a bit of a setup, can only be used once, and costs extra money to actually use. Rumor Mill is super cheap, has no prerequisites, stays on the table for awhile at least, and is an answer to many popular corp cards.

Now, will it force Jackson out of corp decks? I don't think so, but I think it may force some long forgotten cards in. At an ultra low play cost of one and only two influence it is going to be popular indeed.

The ability on this ID may not seem that good at first. After all it helps the runner as much as the corp right? Technically yes, but the thing is, you chose the ID, you can build the deck around it. You can make the ID work for you while minimizing the benefit it does the runner. That said, it seems there are two good ways to build your deck.

As others have noted, a popular strategy is to include all three-pointers. This would include three Global Foods Initiative and probably three The Future Perfect. That way the runner, hopefully, will need to steal three agendas to win, while you only need two. Shi.Kyu can make this more likely. Combine with psi games to get the agendas scored.

I've always played this ID differently though, with nine two-pointers. Shi.Kyu can have the same effect, making the runner need one more agenda than you to win. I've been playing on Jinteki.net with the following for a little while now and winning most games: Trick of Light, Mushin No Shin, and Plan B. Agendas are three Braintrust, one Philotic Entanglement, one Merger, three Medical Breakthrough, and one Nisei MK II. I actually forgot about Shi.Kyu and have been playing without it, but I just added one and will see if it helps. If you Mushin a Plan B, four out of five times, the runner will check it. They fear it is a three pointer and feel the pressure because of this ID. If they don't, Trick of Light will let you score from hand next turn. It is easy to get one of the five, sometimes six 3/2s in hand, the issue sometimes is getting Mushin and Plan B in hand. A couple advance-able ICE are platforms for tokens too if you don't get the cards you need. The deck, being small, is vulnerable to Noise, but then, Noise is a friggin pain no matter which deck you are using. Expose is bad too. But it is a fun deck.

I'd like to mention an amusing scenario that almost happened last night. I had scored four points early with a Trick of Light and a Plan B. The runner then played Employee Strike. He realized right after that it was a mistake and wouldn't help, hurt actually, but kept it on the table. I ended up winning before it could happen but I was thinking... What if he had scored six points while Employee Strike was active. If I then scored my last agenda, we would both have six points and Employee Strike would be trashed. Who would win? Me, because it was my turn? I'd be happy to call it a tie if that ever happened!

Yeah that was dumb, I don't think you can just trash your own currents though, can you? —
Only by playing another one, a different one I would think. —

I've been excited about this card since I first saw it here a couple months ago. It is going to be huge versus two of the three major runner factions. Here are a few scenarios:

Anarch:

I see you are counting on your Datasucker to back up your Parasite. Sorry, my Archer has a quiver-full with your name on it.

Perhaps you think D4v1d will back up your weak @ss breakers? Nope, Susanoo is sending you to archives for the Shock! of your life.

Shaper:

Have you ever spent nine influence on the Grail suite just to then have the runner drop a SMC on the table? I have, and it sucks. So much for your big surprise. Navi prevents SMC from firing though. Artist Colony and Clone Chip won't work either.

I don't see this being as helpful versus Criminal, but there are literally a ton of cards that this will stop provided it is rezzed first.

EDIT: It is funny that despite my excitement over this card, I have yet to use it. As beladee mentioned though, there is now an extremely common criminal card that this can help thwart, Aaron Marron. I really need to try this out in my tag heavy deck.

Against Criminal it stops Grappling Hook and I suspect e3 feedback implants (if so it'll stop it against everyone else like Quetzal who likes to spam it too) —
Certainly it'll stop Grappling Hook as it isn't an ice breaker (just like D4v1d). I don't really ever see that card played though. I think e3 will still work against this card though. —
Why do you say e3 would still work? It's not an icebreaker, so you can't use its paid ability. —
e3 isn't a paid ability. Paid abilities have the cost:effect format, while e3 is a triggered condition. —
ah, good point. I was getting confused because I thought I remembered some ruling where Medium was "using" the card but wasn't a "paid effect" or something. thanks for clarifying. —
It does also shut down many of Giest's favourite trash effects, although not the break and enter Icebreakers. —
This card has crippled my Shaper decks. 10/10 Criminal is back baby. —
among others vs Criminal, this also blocks Crescentus and Aaron Marron, for example with Data Raven-Data Ward server. Definitely a valuable upgrade for servers with high cost ICE, as a way to protect your investment. —