I know lag compensation is pretty dumb, but other then that would it be a cod "classic" Personally I think the guns are so balanced! I can roll with almost any a/r and get some kills and same with any other class. Scorestreaks are good I feel like they made it so they can't stack, but they help out, it was really annoying when someone got a harrier then got a nuke.
The pick 10 system and the new perks are really balanced also imo.

All in all Black Ops 2 is a good game and I really liked the DLC so far. Although, one thing is that I would like maps a little like MW2 size not just small. I wish the maps had more than what came to eye. Like hidden cover and things like that (Just watched a WOR video he really helped my opinion on this as I agreed with him)