If I start adding MLG playlists, know that it's some evil attempt to destroy MLG presence on Matchmaking.
MLG fans believe they should have their own hoppers for every imaginable matchmaking format. Social MLG. MLG doubles. MLG FFA. The average MLG fan's perception of both their own representation of the community and the perception of their clique from the outside is skewed toward this "I am an intimidating person and I play intimidating games," which, and pardon the light ego burn, is nonsense.
A social MLG playlist would not bring more players into the MLG fold. Not in the way MLG fans believe it would, anyway. Instead, it would just divide the existing MLG base in Matchmaking between two/four/eight/sixteen playlists. The reason most people don't play ranked MLG isn't because it's ranked, or because they're intimidated by it. It's because the average person isn't interested in the experience MLG gametypes offers.
If I sound like I'm taking a defensive approach, it's because when people start talking about what the MLG experience "should be" on Matchmaking, it's because they generally have the same misconceptions; they believe MLG represents the majority of Halo fans, that everyone wants to play MLG gametypes, and that the reason I don't give MLG free reign over Matchmaking is because I actively dislike MLG as a community and am simply trying to keep them down. Or something. The reality is that yes, I do recognize the difference between MLG the group, actual sponsored players, and the internet. I don't dice the MLG experience up in an attempt to preserve it because, contrary to common belief, hopper population does appear from thin air, and simply making a duplicate of the existing playlist in the social arena isn't going to attract that many more people, it's just going to divide the people that are already invested.