When is the last time you actually ever build an Ostheer Panther in a serious game? I am curious since you might be talking to the only guy who actually has used OH Panthers in 1v1 in recent memory. And the unit is irredeemably useless. Just try it if you think I am exaggerating. It is not even situational, there is literally no niche for that thing.
I've used it recently, unfortunatly. Whenever I used Ostheer AT that isn't a pak or P4 I usually lose the game. Panthers are no where near cost efficient again due too teching cost as well as their price. But also because their need doesn't really rise since you can deal with medium threats far more reliably with the P4, StuG, and pak walls.
The Command Panther is meta because of the batshit OP target weakpoint on it and call in mechanics. Not because Panthers are so great.
Coordinated fire isn't "batshit OP", it gives +25% damage, +15% accuracy against the target as well as vision for 35 munitions cost. It is very good no doubt, but against the current meta of M4Cs, T34/76s, shermans/m10s, and cromwells it will not solely kill in any less shots than normal. It will however kill advanced mediums in 1 less shot than the required standard 5. Again as I stated in my original post, it's OP because it's a good response to M4C call ins as well as being a panther.
As already stated multiple times, bad on the move accuracy affects all tanks, and the panther does increased damage (enough to 3 hit a medium IIRC) which I guess is to justify the lower rate of fire. Learn to glide shot.
I believe they dealt 200 damage in the Eastern front armies revamp mod by Mr.Smith and Miragefla, however as stated by butcher they only deal 160 damage in live which is 4 shots to kill a standard medium. Your other points are what I agree with 100%.