If you nerfed the frontal armor of the Panther then you would have to nerf the frontal armor of the Tiger.
See how these issues start to compound? The Panther just needs to not have warp speed thanks to blitz, that's all.
No you don't, the Panther's the Panther, the Tiger's the Tiger, history is history, Company of Heroes 2 is Company of Heroes 2.
I'm not saying to nerf the 400 health Luchs because the 320 health Stuart had 36mm more frontal armour, am I?
I myself would greatly prefer history guide the balance changes, but if it is necessary, it is necessary. But yes, to repeat myself, just stick removing Blitzkrieg for now. I doubt the issue will be as egregious after that.