I feel there is no purpose to play this game if you gain nothing else than kills and deaths, and the fact there is not EXP i think its ruining the game and the competitive, i mean look at Halo 3, Win = 1 EXP Lose = Nothing, people were rarely quitting (Yes some was quitting but its normal) but since i play MCC i never played 1 match that no one ever quit, the fact that you get nothing by winning a match is totally ruining the game. Example : A guy with a 5.0 K.D in an objective mode get killed 2 times = he quit, because that guy left an other person leave then its a 100% lose for the team, Halo is about teamplay and not lonewolf, MCC is losing a lot of players, A LOT, because its missing a lot like Objective playlists because everyone is playing for K/D so we get to play BR Slayer all the time which is boring, i still play Halo 3 on my 360 instead of MCC (lol) 343i if you really care about us and Halo do something for god sake !
A social ranking system would be nice especially since the skill based rank is only in one playlist.
Exp systems are a joke. The 1-50 system works quite well for ranked playlists. I doubt anyone will complain if it ever gets implemented.