I mean, i guess then Sherman are tanks which only gods are able to use since they have to constantly be switching munition and don't have so much range and health to soak up mistakes.
honestly, not really. switching rounds on the sherman in combat i find to be a bad idea. i generally set the rounds out of combat, once an enemy has present it self, and then drive in with A move and let the shermans shoot. my sherman micro is spent on moving them around in a semi-intelligent manner that keeps as many alive as possible instead of trying to swap shells. all shermans firing the same round is much easier to micro and much more effective than a mixed group.