P4 is probably a bad counter. Sure it has like 20 more armour than the E8, but the E8 has 45 more far pen than the P4.
110 pen vs 215 armour no bueno.
P4 has actually 125 pen close range 115 mid 105 long range it was buffed all ranges and it is better vs infrnatry that E8.The problem with E8 is that its SOOOOO lucklaster literly it sometiems bounces shot after shot and is so bad vs infrantry and its too slow imo even if the p4 cant fight the E8 but sometiems it always pen my E8 and i find is it worth getting an E8 these days it anymore preatty lack luster and preatty slow imo for a commander ability it should be buffed some how like speed or more armor for more cost be like a premium tank