The rollers that the Panther uses is a better system than the bearings the Persh uses, I'm sure they could be incorporated into that system some how.
The Pershing had been around for quite awhile before the Panther so that was probably an engineering fix by Tamiya.
The ball is the actual problem. It has so little contact area it can quickly cut a groove in the lower turret race, then the turret gets lower onto the hull then the entire under surface of the turret is riding on the hull. Need to get it back up in the air and get rollers with much more surface area.