While in other FPS it is camp, kill, cover, camp, kill, cover... oh it's the end of the game. But i played the singleplayer for 3 hours only(this describes CoD, MW2 and BF BC2 singleplayer if someone has problem understanding it).
If you want something more complex, you don't play FPS style games, you know. How about wait few weeks for Portal 2 ? You will have to use your brain in that game if FPS doesn't fit your style.
And by the way, complaining about game style of Crysis 2 is not a bit stupid ? I mean, it's not like Crysis 1 was any different. Crysis 1 was too cloak, move, uncloak, kill, cloak, cover, recharge, cloak, move,...
Anyone surprised by Crysis 2 gameplay style should have their brain checked.
PS: You are not forced to use cloak. You can play Rambo style too, with Power armor and covering.
Rambo works well anytime you can get your hands on a mounted machine gun just rip it out and use it with armor mode to mow everyone down. Works really well unless theres a couple other heavy guns at a distance.