Ease Repair was not high on the list for the Panther design. Would have been less an issue, had interleaved suspension with double torsion bars been replaced with Horstmann, and double epicyclic transaxle and straight cut final reduction drives replaced with Cletrac transaxle and herringbone gears.
Exactly. Nor was ease of manufacture. They maintained manufacturing standards that were substantially wasteful right up to the last months of the war.
Additionally manufacturing four to five self propelled tank destroyer models
at the same time is the height of logistical complexity.
EDIT: Even the initial Panther concept reflects their overengineering nature. At the start they had the option of a Teutonicized T-34. They dropped that in favor of the far more complex Panther series.
They could have taken the PZ IV design. Keep the suspension and basic structure. Max the gun (like they did). Angle and thicken the armor. Call it a day and grab some good bier.
This would have led to minimum design time changes, minimum retooling and minimum disruption of the lines. Its what the Russians did with the T34/85. Its what the Allies did with the upgraded M4 series.'