I liked the clan feature in halo 2. I also loved the active roster in reach. I think that should be in Halo 4. Just think. You can send clan battle invites from there! Have a whole little community in the multiplayer lobby. I like my stats all organized and presentable. Also easy access. There should also be a community submitter option. You know how in reach when you make a map it says, recommend to friends? It should also say recommend to matchmaking or something. And then a team would review them. This would be epic!