You forgot the Javelin, semtex, marathon, danger close, commando glitch that killed half the team in 1 explosion most of the times, or the marathon, lightweight, commando, tactical that your teammates never seem to be able to kill and always end up on your ass or the shit spawn system, or the crap matching system that puts you in a game with 1 minute left, or 10 points to go, or the nuke timer starts. And occasionally the coldblooded fail when you show up on the chopper gunner as a red square when your trying to shoot it down with cold blooded.
All fun right?
(Never used any glitch and the commando/tactical class and most likely never will.)
EDIT: Forgot the prestige 10 hackers, or the LV 70 staying noobs with akimbo models or RPG's with danger close