[Imp]

Other far more complicated I am guessing is dual state units. Spend x movement points to switch. This would change parts of the game as could now do things like limbered and unlimbered guns. Move but no fire vs fire but no movement.
Even things like vehicle recovery and bridge building could be possible for a one of bit of fun.
Vehicle recovery standard vehicle turns into slow vehicle with carry capacity.
Scrap major AI work would be required.