I'm very happy that this card exists. But I don't think it will see much play.
I'm also glad that the runners have a new way to challenge the corp's deckbuilding. Just like how Atman and D4v1d forced the corp to consider their ICE strength mix more carefully, this card forces corps to consider their mix of 1-, 2-, and 3-point agendas in a new angle. I think this makes the game more interesting for both sides.
But...this isn't a strong card. It's so inconsistent as to be nearly unusable.
This card has a very clear purpose. You want to let the corp score 2- and 3-point agendas, then snatch 1-point agendas, trading them for the more valuable agendas. Used in this way, a runner could easily turn a losing score of corp 5/runner 2 into a winning score of corp 3/runner 5, simply by nabbing a Hostile Takeover off R&D and swapping for an already-scored Priority Requisition.
On top of that, by stealing utility agendas like Mandatory Upgrades, or cards with stacked counters like Nisei MK II or AstroScript Pilot Program and giving them useless "when scored" abilities like Accelerated Beta Test or Breaking News, you can destroy a lead the corp they thought they already had; remember, stolen agendas are considered blank.
But this is best-case scenario. And it requires a number of conditions:
1. The corp is running a mix of different valued agendas
2. The corp has already scored a high-value agenda
3. The runner has this console installed
4. The runner is able to steal a low-value agenda
If any of these conditions fail, Turntable is useless. If the corp's agendas are all the same value, then swapping them around provides very little benefit. If the runner takes an early lead and the corp is only scoring 1-point agendas, then Turntable gives you no way to press that advantage. If the corp rushes out 5 points before you find your Turntable, then you have to decide whether to run without it (and just stealing agendas normally) or wait and try to find it (potentially letting them get out another 3/2 and win). And of course, if you can't get in at all, or get lucky (unlucky?) and only manage to steal 3-point agendas, then Turntable is just an expensive Akamatsu Mem Chip.
So while it's entirely possible for Turntable to cause a four-point swing in one turn, it can only do so in circumstances that are very difficult to predict or control. This is the exact definition of "jank".
Compare that to Vigil. Both are 2 anarch consoles with 2 influence and +1. But Vigil will almost always draw you at least 1 or 2 cards over the course of a game, and depending on the game can get you far more than that. Drawing cards is unconditionally good: no matter what the matchup, drawing cards will help you build and maintain the tempo you need.
I would love to be proven wrong about this, but I feel like Turntable is going to go the same way as #Monolith; a fascinating piece of design that just never seems to work in practice.