Well I would expect any characters created now would be in the same ballpark in terms of power as the rest of the roster. But my primary issue is infinite energy. Really, as long as that isn't a part of the character, I'll probably accept it. An android/robot/cyborg can be equal in terms of power to the rest of the cast, but if they have infinite energy then they have a drastically distinct advantage that would render them almost undefeatable. They would never exhaust and would be capable of going full-power at all times. So that's why Gero-level androids are a no-no but something similar will be okay.