I think it would be cool to actually have more in game stat tracking.
Maybe if they actually fixed their website with their "VIP Codes" you could see various diagrams... For example map most played, map you vote most out, where on average you hit them and where on average you are hit. Weapon you've shot most bullets with, your most accurate weapon, weapon most used, perks most used. Even what map you get the best KD or score on, on average... In what gametype
Most of all though I think MW2 needs a Halo Theatre or Uncharted movie thing type thing... Or an youtube uploader feature...
Hell with MW2 all the stats they could track is endless it would be amazing to see it happen... Actually thinking about all of that is just plain awesome.