No lag compensation.(KILLED mw3)
Improved hit detection (the biggest falback on BO)
make weapons balanced (instead of EVERYONE running around with famas or ak74)
watch your leaderbords (thats where the hackers always show thier faces)
no quickscoping (unless you wanna put it in its own game mode)
loose the emblem maker (i like seeing people be creative...but 95% of the kids love to have a male member for their emblem...annoying after a while)
and my biggest one is being punished for server dissconect. I know its desighned to be fair but if you think about it. If im the host and my teams loosing..WHY NOT DASHBOARD? that means the team thats winning gets a loss as well. When you created that it made it to where everyone on a losing team dashboards in hopes that their the host giving winning team a loss...i popped in BO's last night and 12 of the 15 matches I was in ended in loss of connection when host dashboarded.
I say keep the w/l and k/d ration hidden ( only visible to the player) and youll get rid of 75% of the hackers and 95% of the dashboarders.