This unit is my build choice as OKW now instead of Panther. It's a beast against both infantry and Mediums, and really shines at vet 2 onward.
With heavy delay, making it pretty impossible for any faction to wait for call in's, this unit fits perfectly in the game as it stands.
In my opinion the Panther kinda sucks at countering Allies su85s and M36s because its attack range is only 50. I would rather go for JP4 to counter Allies tank destroyers and use Panthers to counter T34-85 blob.