When, for any reason, the release artist is OK but not the track artists and we need to change all tracks at once, we can't.
Ex.: http://musicbrainz.org/edit/15575970 where all artist credits had to be done manually.
We miss something like either copy release artist to tracks button or copy current track artist to all tracks button.
Or it would be nice if, when we uncheck the track artist column, it would take the release artist.