There's a reason the panther was nerfed down to the level it is in right now.
To put it simply the panther can't have evertything. It's combination of speed, armor, and range already makes it more then capable of diving to kill tanks and escaping from potential threats. Better then anything the allies have, only the comet comes close and is still waeker in the AT department despite higher price.
It has a low rate of fire to give the allied players a chance to actually react to it and save their armor, something that was found to be needed after years of axis having a pretty much uncontested late game advantage.
