How many times have you been in a game of MW2 that is super competitive for about 4 minutes and you're thinking, "Wow, this is fun", and then a harrier goes up in the air. It just kind of ruins how competitive the game could be.
I know people love their killstreaks, and while I think they should be taken away forever, that is simply not an option. I suggest a playlist in which there are NO KILLSTREAKS OR PERKS (or footsteps please). I like the perk system, but the game would require a lot more skill and would be much more competitive because it would take a better shot to kill someone, and camping no longer reaps the same rewards.
Keep the main playlist for those who want to play with everything, but offer a playlist with just you and your gun. I don't care whether it's mosh pit type or simply just TDM, but it would work well and would be a nice alternative for a competitive player.