Adding a "Batch-add disambiguation to recordings" and a "Batch-add ISRC to recordings" option to the relationship editor would be useful

For live & clean/explicit albums (to mass disambiguate recordings attached to a release with "live", explicit or "clean")
For CD albums (to mass add ISRC to the attached to a release). Could work like when you add a medium and submit a tracklist (I guess)

Mockup I made: http://i.imgur.com/i8zAO0M.jpg