The main problem i've got with the game is that your "super suit" really doesn't differentiate you from the enemies that much. It's just not that super.
What i mean by that is the number of bullets you can absorb when you're in "armour" mode is pathetically close to what any ordinary armoured-jacket wearing Korean soldier does. Why is this the case? I can take the submachine gun or the AK47 variant and unload half a clip into a guy's chest a close range and he's still standing but what feels like the equivalent from one of the enemies has me in the same state - severely wounded and almost dead. If two enemies are around, one with a shotgun then i'm lucky if i'm not dead. So basically, the super-armoured capacity of my suit is around the same level as a standard kevlar jacket. Why not just wear a kevlar jacket underneath my super suit and instead use the "strength" mode instead? It beats me.
Then there's the problem of the suit's power, or rather the lack of it. The suit just doesn't have much of a charge and so any ability you're using runs out in less than 3 seconds. 3 jumps for the strength mode, ~3 seconds for the speed mode and a few shots for the armour mode. The stealth is actually a little better and lasts longer but again it just isn't effective. Not to mention that it's completely out of kilter with how the game presents the supersuit's abilities. During several cut-scenes you and other suit-wearing characters wander around in the cloaked stealth mode without a care in the world and there's instant recharging after moving objects (which would otherwise deplete your energy in gameplay) and no worries about moving around. It's really annoying.
The AI is mostly poor. While it tends to retain the eagle-eyed and sharpshooting abilities often seen in Crytek's predecessor, FarCry, they have managed to make the enemies act confused from time to time, whereby you may fire at one of their number and they won't all immediately know where you are and make a beeline for your location. It doesn't take long, however, and even if you use a silencer they always seem to know where you're shooting from if one of the people you're killing sees your location before he dies - despite the fact that he would be unable to relay your location in a similar situation in real life. That really kills the point of stealth in this game.
The only redeeming feature of the game is the weapon mod system which i actually really quite like. Being able to kit out each weapon with an increasing number of modifications such as sniper scopes etc is really nice and makes each weapon far more versatile than it would initially appear.
So far i think i'm about a third to half-way through the game and it's not a bad romp.... but i think it lacks the character that made FarCry enjoyable and doesn't quite match up to its own aspirations enough for your character to really shine as a multi-million dollar weapon of war.