When I delete a domain from a file geodatabase, it would be really nice if it would automatically remove the domain as the default domain from any fields it is currently assigned to. In FGDBs with many datasets, it is difficult to try and find which ones may have the domain applied. Please make it an option in the options tab to automatically un-assign a domain you are trying to delete.
Hi Dylan, I suggest re-posting this on the https://community.esri.com/community/arcgis-ideas page for greater visibility!