If you add in 76mm vanilla Sherman it defeats the purpose of a DLC commander's unique call in vehicle; I also recall that medium tanks are not in the scope of the WBP mod.
It would be a bigger problem for the an upgrade for the Soviets T-34, since more commanders have the 85 than the USF have the EZ8.
But still, if the USF get an upgrade for the 76mm gun like in CoH, the EZ8 could just remain a better version of the Sherman that can be called in in groups again or something.
The USF would still have a more beefed up Sherman, capable of semi-taking on the Panther, and have the better at taking out Armor Jackson.
I really wish to see a Jumbo in the game one day tho.
The USF just does not have enough meatshields, not that the UKF and Soviets do, but at least the Churchill and KV1 SORT OF fill that role, they're underperforming but it's better than nothing.