I think the most important thing they can do is design the Challenge system to be dynamic, rather than based off fixed templates that are on disc. A strucuture that lets 343 build Challenges from a host of variables (i.e., mode, goal, parameter 1, parameter 2, parameter 3, reward) that can be updated, experimented with and even pushed to the user end (custom Challenges) are my pipe dream hopes for the system.Yep. Reach's challenges were pretty good on paper but at the end they lack on variety. If 343i manages to fix this problem, I expect great things.