I find it quite unbalanced that the factions with the best tanks (KT, Tiger) have the best antitank (shreks, pak, JT, Elefant, Panther) with the best escape (Blitz and Fog).
I think most players will then just skip T2 and rush a P4 which will complete destroy the balance. Just increase the received accuracy of the sniper on retreat that would already help. With my M20 I need to chase the sniper all the way to base to take him out.
I think the issue with balancing the USF is the hugh difference in 4v4 (useless) vs 1v1 (very strong). On everything higher than 2v2 every OST player goes staight to T4 and crushes USF tanks post 25 min with panthers and brummbaer. In a 1v1 you can counter heavy armor either by an infantry advantage denying your enemy to cap the map or flanking. Both tactics are nearly impossible with all the units of a 4v4. Thats why most 4v4 are actually just standoffs around the VPs. I dont understand why they cannot change the balance depending on the playmode. I believe that would be the best option to avoid overpowering the USF in 1v1 and to bring it back as a valuable fraction in 4v4. Other than that you could replace the sherman easy8 with a sherman firefly. Since the easy8 is not a callin anymore I really dont see it being used anymore.