It would help to have a tool that identifies orphaned domains and lets us delete those domains. For example, a geoprocessing tool that populates a checkbox list in a parameter with a list of unused domains. The user would have the option to select all, or select specific domains, and then delete those domains.
I'm aware that can be done with a custom Python script. However, it would be better to have an OOTB tool built into Pro to let non-coders easily manage their domains.