Bottom line, I'm in X tank and I see around a corner a medium tank coming at me, the T-34/85 or VK36 are going to give me much more pause than the E8 will,
Pretty much this. My current main tank is a T-28 and I can take down E8's with relative ease. The VK 3601 and T-34-85 I leave alone. They will bounce my shots and one-shot me in kind. The vaunted speed of the M4A3E8 does not keep me from following it with my turret, nor does it prevent me from tracking it which invalidates its supposed advantage.