Sander explained to you plenty of times its effectiveness vs mediums.
If you didn't understood that, you aren't going to understant it when I'll do it as well, so no need to waste a breath.
Existence of panther is extremely relevant, because panther to JP4 relation is exact the same as SU-85 to SU-76 relation - different TDs for different targets. I don't see you complaining about SUs differences and how 76 doesn't have 200+ pen, I can't see why you have a problem with JP4.
You want JP4 to perform like allied end tech TD, you'd have to make it OKW end tech TD, that means stripping panther of its AT role or completely removing it.
