One of the key ingredients in the success of the Halo franchise was forge mode. Giving the community the tools to be creative and create their own adventures. The Reef seems like a big empty purplish pile of rubble that would be perfect to allow you to become an "architect" in. People kept playing halo because the maps never got stale on account of the community always creating new ones. Recreating old favorites, making new favorites, rocket race or grifball to break up the shooting. These are what keep people after the grind ends. The community is backslashing because they see the potential of this game and are hungry to experience more. A Forge mode would take away the grind and add so much outlet for the great followers that have been with you since Halo. Plus I want to play blood gulch with my hunter... And Guardian with my....guardian..