We are talking about an almost completely different beast. It's not as if the panther wouldn't be giving up something in return. If caught in a bad position it would be almost as vunerable as a P4. Good micro would be rewarded while bad would be punished.
In my opinion, the problem with PV is not its current stats but it's role, the gap it fills in the game. Say, if it was Marder III instead of Panzer V, I think no one would complaing about it's role this much. Almost every week someone opens up a thread about Panther nerf or stat change.