The game is much more balanced overall. There is not as much nube-toobing, no more nuke boosters, not as many claymores everywhere (i don't think scavenger generates new claymores anymore), no more commando (i think?), quick-sniping is more difficult, no more stopping power, most guns have more recoil, the light machine guns don't seem to have as much ammo, and the killstreaks don't build off of other killstreaks.

I really like the wager matches as well, especially Gun Game and Sticks and Stones.