Yes it is. Cus USF have no actual defensive capabilities they have to attack, those extra units that don't have to build works in increasing field presence that your presence now has to counter with lower number of troops. They'll help you cap/flank. The fact that you don't have to wait long in tech transition to get better units gives you far more immediate advantage than those abilities.
And the game is supposed to be about choices and consequences which the current build of the game has been extremely eroded away.
4 squads of volk or panzerfusilier, this is the standard group okw. The USF also have 3 squads of riflemans and of lieutenant OR captain. And they all arrive at the same time. But OKW does not buy stg44 technology or grenade flame. And panzerfusillers too.