Putting in T4 a medium tank that would be fuel expensive to a fuel starved faction is like giving to one knight the best armor and weapons and send him alone to conquer the castle.
Thanks but no thanks, I will rely on my panthers if the fuel cost for PIV J will be ridiculous as some people are discussing here.
The OKW P4 has about 51 % chance to deflect a T34/85 shot on long range, 44 % with 3x 5 % armour bulletins.
Just to compare, a SU85 has about 49 % chance to penetrate a KT on long range.
You are underestimating how good the OKW P4, especially with vet.
Combine it with a pak43 or a JP4 and you have a force that is hard to take out.
I played already 1vs1 in alpha with it and there were long games where I fielded KT, Stuka, P4.
When playing okw the biggest challenge is to keep your armour alive, not to initially field it.
It deserves its 135 price tag, especially when the T34/85 also costs as much.