Did u really just? compare the maus to the pershing?
Yup. Imagine seeing that in every game. Would suck...
USF relied on medium tanks and only in the last weeks some Pershings fought around the Rhine region. Now imagine seeing that faction - which again, relied almost exclusively on medium tanks - getting a Pershing every game.
With that vehicle almost every game the USF would jump a category higher with their tanks. The German equivalent of "jumping a category higher" would be the Maus.
To be totally clear though: I fear that the weak US late game will never ever get fixed with a Pershing. Sure, then there´s the Pershing but that means it´s rather unlikely other things get fixed, like Jacksons or M4s.