Just beat the single player campaign, the game is pretty meh. It lost a lot of the Crysis 1's open feel. I would be fine with that if the story and gameplay was good, but they were just average. The story is not bad, but definitely not great. As for gameplay, they really didn't take advantage of the vertical level. There are many times where I wanto grab a ledge that looks like it's reachable but it wasn't. Also the gun doesn't hold enough ammo for their firing rate. I feel like I have to constantly conserve ammo, that sucks imo. I end up having to just melee a lot of enemies.
That said, I'm surprised my card can still run it on Ultra (without DX11 and HD texture) with FXAA or SMAA. The CryEngine 3 seems to be a lot better optimized than CryEngine 2. If game devs do continue to use this engine, I hope they would integrate FXAA in the game, FXAA is an acceptable compromise between IQ and framerate imo. If it's fine tuned by the game dev I think it would look better than just using the injector. Both Skyrim and Deus Ex Human Revolution's FXAA seems to be able to smooth more edges than the FXAA injector did. I didn't notice many jaggies when playing either game, but I can still notice the FXAA Injector missed some edges in Crysis 2.