Configure multiple Datases as „Database for primary parent objects“

The function of "Primary parent objects > Pass down descriptor values" is very nice, but also very limited since only one Database can be configured as a "Databse for primary parent objects".

Meaning if i have two different document/record classes in the same database that should receive descriptor-values from two different primary objects in two different databases, currently this is not possible.

I have received information from SERvicedesk, that this has been set up intentionally due to performance reasons, but from user-side-of-view this is still a valid requirement.