Volks can't fight equal fight early game, Cons can. That's why Volks are getting a buff.
That's why you support your volks with the first Sturmpios, who unlike Combat engineers doesn't need to return to base to build anything and can be use offensively.
Sturmpio+volks own conscripts+engineers
As OKW you have an average long range unit plus an incredible short range unit, meanwhile soviets only have average short range units in the first minutes of the game.
Well microed, I think impossible to lose your first engagement against a soviet player if he did a T0 start. Buffing volks will only make that even easier for the OKW player, making T0 start useless and encouraging sniper/maxim spam.