It's an interesting time for Lotus Field. Once the best ice for improving a deck's match-up against anarchs in general and Yog.0 specifically, there are now a couple of solid solutions to it. Net-Ready Eyes will get your Yog up to the correct strength, but unlike its cousin The Personal Touch will also support other breakers, elevating it above 'silver bullet' status. It also has the advantage that it's not hosted. In faction, Faust breaks Lotus Field for a couple of cards - a totally reasonable cost for a runner with a bit of redundancy in their deck, like the WyldCakes combo for instance.

Given the existence of these new tools, is Lotus field still a good card? I'd say yes. Both of the solutions mentioned above require installing another card to be able to get in. An extra gear check is still a valuable effect, even if the gear has improved. Immunity to Parasite is also a giant upside that shouldn't be underestimated. Its numbers look very similar to Bastion, a mediocre but playable ice. It costs an extra , but then its a code gate, so it will often cost more to break (If you compare breakers with similar costs, like ZU.13 Key Master to Corroder or Gordian Blade to Cerberus "Lady" H1).

Lastly, at a low, low cost of one influence Lotus Field is an easy splash. This is especially important for Weyland, who infamously lack decent in-faction code gates. It's cost makes it the middle of the road option between neutral codegates like Enigma and monsters like Tollbooth. Crucially, it demands the installation of a breaker (Enigma and its cousins are parasite fodder). Blue Sun: Powering the Future particularly likes it, because Wormhole is worthless when you don't have any other ice rezzed.

In conclusion, I think Lotus Field will continue to be a big deal in most metas. It's a good thing that anarchs won't have to swear quite as much when they see it, but it was strong enough in the first place that it's still a solid choice, despite having been weakened.

The role of Lotus Field has changed with the release of Şifr as the combo with Parasite to Trash ICE immediately is not working anymore and as long as Anrach remains the dominating faction.
It's resilient and currently the cutlery (Forked, Knifed & Spooned) is falling out of favor as you can do the same with Parasite (& recursion). It's imported into all other faction as an ICE that can't be destroyed so easy and it's out of D4v1d range, but weak against Faust (2 cards). With Black Orchestra it's 3 creds to break to much to do that repeatedly as the current Anarchs try to do when hammering R&D. And Yog.0 needs support cards such as The Personal Touch or Net-Ready Eyes which are currently rarely seen.
But it will rotated somewhere in the second half of 2017. It teams well together with Magnet and Architect the only 2 other ICE that are kind of immune to the ParaSifr combo and as long as it's played Lotus Field will remain an important card.

A strong code gate with a unique and powerful ability. With 4 strength and no way to lower it, Anarchs (or anyone, really ) running Yog.0 cannot ever get past this. No Parasite or Wyrm can touch these pristine petals, and it can't be rudely cut by an Ice Carver.

However, it is expensive and only has one subroutine to end the run. If you need a strong defensive code gate and don't want to shell out for Tollbooth, at one influence you could do worse than this. Have one ready against Anarchs and let peace of mind flow.

The last review was from 2017, so we need a (system) update:

Lotus Field came out (again) in System Update 2021. I can't speak for standard format, but in startup and gateway, it's text is relevant only versus Chisel(since rotated out of Startup), Leech, and Ice Carver. It's a strong counter to the Buzzsaw decoder(without K2CP Turbine), but other than that, it's overpriced. Botulus or hyperbaric break it startlingly easy for costing 5 to rez.

The expected credits saved if the runner could reduce Lotus Field 4 to 3 strength: Abaasy: 2; Buzzsaw: 3; Everything else: 0-1.

I don't think people would pay influence for it. Even jinteki players aren't running it. Wait until runners have new tools that require low strength ICE like Chisel did.

Now if the text also said that decoders can't boost their own strength while encountering this ICE, and the ETR became "the runner chooses to ETR or take 2 net damage" it would be a whole different story.