I feel like The Master Chief Collection custom games (whether it be in private matches or in the browser) should have all game types available. Another thing I think that MCC should have is completely custom game types. Fully custom game types, if they are ever allowed to be an option, should be available to be made on both PC and console. They could start out with you picking a base game type (like Slayer or Capture the Flag), and let you customize things like objects and labels in Forge (like making a thing that marks you as able to go past objects marked as doors). Finally, I feel like MCC could use a file browser similar to the custom game browser that can let you look at and download other player’s shared game types and forge maps.