Some people just like to complain.
People complain about graphics when the graphics aren’t really anything to complain about (it runs much better than the first game and is less unstable, plus it is possible to modify individual settings with the console and system.cfg), people complain about no DX11 (disappointing, but really it’s possible to live perfectly fine without it).
The game gets compared with Call of Duty but honestly it has so much more freedom than people would make it seem. CoD pretty much just points you in one direction to shoot and makes all enemies all-star grenade spammers with infinite respawns for some reason. In Crysis 2 it’s considerably more linear than the first game in that the progression of areas is linear but within each area you’re allowed much more freedom than a CoD game, and there is a set number of enemies so infinite respawns are not an issue. Even if there are a lot of enemies, they never respawn infinitely and they will eventually stop. People forget that CoD doesn’t allow freedom of movement beyond maybe a house or maybe a few random bits of cover on a mostly flat plane and running between those points of cover. Crysis 2 allows you to take advantage of the environment and the little things that have zero functionality in a CoD game.
People complain about less suit functionality but then they don’t realize how the suit really is more powerful and useful. Armor mode actually works like armor, as in you really can absorb a significant number of hits when it’s on and it’s not just some BS “Default” mode with a fancy name. Switching modes is easier and more streamlined than the first game, and considerably more forgiving. Not to mention that energy recharges much quicker. Because of all this you are able to get much more out of your suit than you could have in Crysis 1, although the sprint speed is considerably slower for some reason.
The only problems I have with the gameplay are the inconsistent cover/lean system and the fact that out of every dozen or so really good AI maneuvers, there are usually one or two enemies running into walls.
And then there’s also the thing about the story being much better than the first, and it ties into the first game well too.
EDIT: I guess Someonerandom does have a point about the lack of sheet metal buildings.