Man, this was not my experience in the beta at all. I was coming from a few weeks of playing COD when I got into the beta, and the weight and recoil of the guns in KZ2 did take me about 2-3 hours to get used to (mostly the recoil) but then it clicked. (I also stopped laying on the trigger and spraying, and did 3 rd. bursts instead.)
Then again, I left the sensitivity slider alone, so I got used to it. Maybe that contributed to your control issue, if you were constantly adjusting the controls hoping to find your "spot."
Also, if, because you are such a COD fan, were you going to ironsights practically the whole time like you do in COD? Because I don't think there's much aim assist at all in ironsights mode in KZ2, but I think there is a bit of aim assist when shooting from the hip.
I don't know, I'm just trying to figure out what your issue was to give the controls such a low score. Personally, after playing KZ2, I disagree with you on the whole idea of COD being "THE FPS to beat" in terms of gun feel. To me, it's like driving a big old 1970's Cadillac down the road...no "feel" for the road at all, just a gun-on-a-stick disconnect from reality. Shooting an assault rifle full-auto should be a bit more challenging for everyone involved on the battlefield. KZ2 opened my eyes up to how immersive adding that heft and recoil could be, even if it comes at the expense of staying snapped to your target while laying on the trigger. I can understand why some people might like the "Cadillac Cruiser" feel, but personally, I like to feel the road like I'm in a BMW.
Oh well, different strokes...maybe you'll come around like I did, maybe not. I only played the beta about 22 hours, which isn't that much longer than you played, but the feel of the guns really clicked for me.
As far as acceleration goes, I didn't really have a problem with the speed I could 180 or anything, and I've put in more time on the much faster, much twitchier RFOM than any other FPS besides maybe HL this gen. You really do wanna watch your six in this game though, cause people will own you from behind. I don't mind this, considering the more tactical design of the game.