The command panther is quite possibly the single best tank hunter/destroyer unit in the game- better than even the Ace, I think.
It costs 25 fuel more than a regular panther- and IMO the ability to self-spot while maintaining full mobility, something no other vehicle except the tiger ace and the puma can do, would justify the price increase alone.
It has a ridiculous mark target ability- and the justification that it 'only lasts 20 seconds' is silly. With it enabled, the panther alone can two-shot jacksons- which takes less than 7 seconds, assuming you mark before your first shot. All medium tanks except the T3485 die in 3 shots, or 14 seconds. The cmdpanther can very easily take an IS2 head-on with the ability active. And it costs a grand total... of 35 munitions. You can quite literally use it in every single engagement. Seriously if you're buying so many shrecks that you can't afford to use this ability, which costs less than a bundled grenade and is ten times as gamechanging, you're doing something wrong.
And of course there's the aura. I don't have much to add about it, because in 1v1s and 2v2s there isn't usually a whole lot to buff (though elefant + scopes + cmdpanther mark target is pretty hilarious).
I'd say the command panther is let down most by the doctrine it comes in, which isn't really so useful in 1v1. The unit itself is incredible, really. The odd thing is, there's a perfect historical command panther that would fit the same mould as the ostheer command P4- weaker gun but chassis of the same strength.
Schwere Panzerjägerabteilung 653 operated a panther used in the command role, with a panzer 4 turret and gun, on the eastern front in 1944. OKW is technically the western army, but this would be far more unique than just the reskinned superpanther that it is now.
Just my two cents.