Ok we all know that we want more vehicles: from halo 1 to halo wars to halo reach except the covanant ships and unsc frigates
We also know we want much more armor custimizations:Hands,wrists,waste,boots,back,accesories(helmet),acceescories(body), ect
Maybe some more assasinations:
Limited armor abilities that do not recharge
Bigger forgeing capacity:change faction from forunner to human to covanant to flood/all vehicles and weponds forgable/mountains forgable/doors elevators and bridges that are activatable
Forgable firefight: custimize how many and where you and the AI spawn and the wepond drop and bigger firefight maps
Cinematic spawning:drop pods, drop ships
No armor lock, maybe armor lock down that is when your teammate can unlock your armor only
all weponds back: from halo 1 to halo reach
A campaign type of playlist when you and your freinds are with some AI and have to finish this objective and the enemy are also players with AI
A version of a killstreak that calls suport in certain playlists but you start with them you dont have to earn them
And avoiding to copy Call of duty /perks,custimizable wepond,ect
Back to halo 3 system ranking:skill points.
And last but not least try to find a way that campain and multiplayer bring back that halo feeling