there's definitely more intention for more AI but it's not something that will happen instantly with the current limits.
cover zones are a nice idea but personally the idea of covering my entire map in them just so the AI will hide seems like a lot of unneeded effort, would be much more sensible if we could get a way to determine object dimensions and rotation and then it can be all handled in the background.
also AI can't really fire over obstacles right now anyway (anything above waist height is counted as a blocker and anything below is so ineffective as cover it isn't worth it) so it really isn't very "smart" for them to hide anyway.
i'm very curious to know what you would consider smart AI though, maybe they just need more dangerous weapons to make the gameplay more interesting? some grenades to remove you from cover or maybe some system where they will run away and use medkits to heal if there is cover nearby?
i do agree they could do with some sort of "team work" but i'm not sure how that would be achieved to fit a general game for everyone.
as for aggressive, right now all they do is charge at you and fire until you die... i'd say that's pretty aggressive
life\'s one big game
windows vista ultimate
i5 @3.3ghz, 4gb ram, geforce gtx460, directx 11