Coh Brits were moveable? Fascinating.. but wasn't it still a sim city faction? What was the point? Am brainstorming game ideas why are you saying debunked? These aren't conspiracy theories. Can anyone actually say why mobile bases would be bad and not interesting? BTW not every faction in StarCraft has this just the Marines obviously.
*Terrans, "Marines" arent a faction.
Dont understand why you would describe your own idea as "simple", considering all the veterancy levels youd have to balance, not to mention including a totally new feature of being able to turn the buildings into trucks again.
Balance atm is not perfect, considering the low rate of patches it would be smarter to make small but effective balance changes, and not going crazy with far-fetched ideas like yours. I understand that your point is to make OKW more dynamic and mobile, but imo with the latest rework of the Firestorm doctrine you now have an option to play that playstyle.
Moveable HQ's wouldnt really make the faction more mobile, most probably it would result in people using the flak-HQ as an MG on steroid, shifting to a different position after every engagement, which sounds pretty cancerous to me.