The thing is that these tanks don't seem to be able to compete even with the worst Axis heavy tank in terms off performance , basicly what all the vs Panther videos where all about.
They just don't reflect the cost for how bad they perform and you are just better off just spamming a bunch off tank destroyers.
Unless you think that heavy tanks don't perform well enough versus infantry to justify their cost then that's not really much of an argument. Heavies do well enough versus Panther that if they are supported by infantry or support weapons they can force it off or have them risk losing the Panther. Just because they don't win in a vacuum doesn't mean they need buffed. Sure, if you want to kill tanks you are better off spamming TDs but that's not nearly as flexible as a heavy tank that can also force infantry retreats. Which again, is the whole point of heavy tanks in this game.