Just some general things about the game.
1) The framerate never dipped online and in single player from what I played.
2) I only one into one bad lagger and host advantage seems to still be in full effect (PC owners will be pissed)
3) Treyarch officially deserves less hate than it deserves. Sure it kind of rides on IW coat tails but it had great stats tracking and multiplayer options (Local, Mercenary, etc.) AND you could party chat in the game.
4) Almost nobody speaks in any game for strategy making the lack of a party chat option REALLY suck. Most of the open mics are used for my endless stream of curses and insults back and forth. Smooth move IW.
5) P90 got buffed. Start crying in 3...2...1...
6) Bullet damage seems alot more universal than it once did. No longer will silenced classes have to empty entire clips to kill one guy.
7) Harrier, Gunship, Nuke, AC130, Counter UAV/Sentry, etc. Unlock in around that order. Your welcome.
8) the other game modes should unlock WAY earlier and Cold Blooded should be awarded way sooner (if the Chopper gunner is any indication of what games will boil down to.
9) Airdrop usually drops worse stuff the better you do now that I am looking for it.
10) Custom Killstreaks shouldn't be universal. I kind of wish I could switch killstreaks between classes seeing as my stealth and sniper classes play completely different.