I've gotten pretty good lol.
There are a few aspects of it I still don't like...
Shotguns are still too weak (and I got KSG-12 in GOLD, I've used them enough lol). Spawns are still horrible (sometimes). Last stand and dead mans hand need to be out of the game period. Too easy to shoot down high count assault killstreaks. Juggernaut should not be a support killstreak and the assault juggernaut should be upgraded (it's a joke!). Is marksman overpowered? Maybe. Assassin pro is getting a bit annoying.
Map size is ok for me, I've just been using 90% submachine guns and shotguns. But I could understand why some people would want bigger maps. I think my favorite COD map of all time is nuketown from Blops, about as small as it gets!