A performance gain would be good. I find some of the larger maps much more frustrating to play, and I think it has in large part to do with the frame rate, which seems to make precise aiming more difficult. Basrah in particular, is a map I don't really enjoy
@Xcept1 - A question regarding the new inventory system; are there any plans afoot to change the way weapons/items are selected? I quite often play medic and one thing I find quite frustrating is the time it takes to switch between bandages/medkit. I tend to just press "5" rather than using the scroll-wheel, as I can do it without looking and there's less chance of making a mis-selection. It's pretty annoying to tap "5" and pull the medic bag, when you need the bandages. It might not seem like a big deal, but in the middle of a firefight when you're trying to get to someone quickly, you can waste precious seconds messing around trying to switch - especially if you're moving between multiple victims and switching bandage/medkit frequently. Also annoying when you take a hit yourself and start to bleed out, so you go for the bandages and get the medkit - I have actually gone down before because of this and the time it takes to switch between the two was enough to get me killed.
Similarly, things like switching between smoke and HE grenades with the M203 - it seems like this could be better accomplished with a "weapon attachment" key or similar, as in other games. And the achingly long time it takes to flip up the sights of the RPG and ready it for firing...argh!
I know this is a game striving for realism, and I don't expect to be fast switching between weapons like CoD, but smoothing out simple things like this really add fluidity and realism to the game.