It should also be said in comparisons, particularly on topics of accuracy, that the Panther (the obvious counterpart to the USF Easy Eight) has much better accuracy for the main gun
Here lies your mistake. The easy8 is not the counter part of Panther. The Panther is not a main battle tank but a hybrid TD with MGs. It is designed to take Super heavy tank like the IS-2. The Easy8 is the equivalent of the T-34/85 and is not designed to take out KTs (The M36 has that role).
In addition:
Otheer Panther his higher tech requirements and is more expensive
The easy8 has better accuracy on the move
1. lol. Do you compare E8 with panzer 4? Doctrine tanks? are you serious? 
Ostheer Panzer H is doctrinal and actually less cost efficient than Easy8. If it was clone of easy8 you would actually see how good easy8 is.
What can this "doctrine superior gun" do against Panther and KT? Especially if the panther with vet1 (with more armor). Dont say such funny things.
SO let me see if if get this right, in you opinion Easy8 should be able to take out the more expensive Panther and KT 1vs1.
I my advice, play a bit like axis so you can get a better perspective of thing.