What if instead of changing all of the popcap settings and fuel costs okw just got -50 basic manpower. Its a lot. That would mean okw at 50 pop are as much starved for manpower as any other faction at 100 pop. They would have to choose between infantry bolbs and building multiple vehicles, as we can see now one of the 2 is actually enough for okw to win.
It would also fit historical context becouse axis were not starved for vehicles in ardennes, they managed to gather as many tanks as they wanted. What they failed to do was to gather manpower, only half of planned number of soldiers were used in assoult due to shortages.
What is even more important such change would still let them benefit from multiple vetted squads but would hit them hard if they wanted to rebuild squads after wipes.
Messing with manpower income is dangerous, in terms of game balance. Manpower decides games.
I'd rather they just paid a lot more for their units. 300mp for volks, 400mp sturms.
(Or revert the patch and make OKW cool again.)