As someone who currently plays Allies most of the time I am asking myself why the P4 needs even more buffs, especially in terms of armor.
I am personally struggling in the AT department when playing Allies.
Sov T1 - there is no counter to a P4 if your enemy is not retarted ( = eating sticky satchel charges).
USF - Probably the "best" faction in this case, AT gun is decent and Zooks are also nice. Snares available.
UKF - Besides having a nice AT gun, UKF does not have snares without commanders.
P4 is already a real pain in the ass (the same thing I had when I played mostly Axis and facing a T70).
