343 could really impress us by innovating the Halo2 clan system for Halo5. I am not saying to just give us another friend list. A single team name, unified ranks within, and a limit to the team count would reunite the community. These two playlists would feature less quitting by not allowing random players, derankers, and more.
MAJOR CLANMATCH GAME from Halo2:
What other features would you like to see? A teampage on the player card with detailed stats?