Obviously this is only under the assumption that 343i chooses to create a heavy tank (campaign or special MM modes) but I believe the analog sticks can be utilized for something new now that moving forward is basically second nature to most players. I’ll make this quick.
Grizzly: Main Cannon; Turret; Canister (optional)
‘A’ button toggles movement on and off.
Left Analog moves Turret
Left Trigger fires Turret
Right Analog moves main cannon (main cannon guides the direction the tank moves towards)
Right Trigger fires main cannon
‘X’ button is canister
‘B’ button is for reverse
I don’t see a use for the ‘Y’ button.
IMO this would be an easy to learn hard to master for the tank. I have reasons as to why this is more beneficial beyond just player control schemes but I will save that for another time.