It seems that what is not resolved is the issue that 1 car has OEM RR dampers. (covers shocks and struts).

1st deal with that issue.

As far the a general rule change for dampers, what is the purpose of the change?

Availability, Cost, Better Performance. Where is the data to support these factors or any factors that should be evaluated to call for any changes?

How about real numbers except stating that costs drop for one or anther reason!