Not after 5 minutes.
Imo, reducing the fuel income from territory point by 1 should already reduce the game path. And probably already creates new balance issues between factions.
Every faction which does not relay completely on support weapons and mainline inf would probably be crippled instantly.
Delay T70 for too long against OKW if you don't spam guards and you're up for a loss.
Tho only economy changes that game needs but won't get is reduced mun and fu income for team games.