Snip
Here here! Especially the buff to moving accuracy. The Panther needs a defined roll that differentiates itself from StuGs (turretless TD with good Penetration). IMO it should be a mobile tankhunter that can utilize its speed and turret in a way that StuG's can't - otherwise you're almost always better off going multiple StuG's and compensating by protecting your flanks with Shreks and/or Mines.
I'd also suggest something fun like giving it Combat Blitz (the OKW version that gives you improved accuracy) at Vet 0 and then giving it some other minor Vet 1 bonus in its place - maybe shifting some of its improved health/armor from Vet 2 to Vet 1 so you get it sooner?
Way I see it is you either need to buff Panther or somehow buff the T4 Teching price to make the live version of the Panther worth the cost of going for.