There should be a means how to batch edit the artist credits of recordings.

This is extremely important with the new classical style guide where recordings are credited to performers while tracks are credited to composers. Release editor creates new recordings with the same credits as tracks also recordings created in the past are credited to composers too.

It is not just to declare the style guide (which I otherwise like) when it is practically unrealizable.
Example: CD with 49 recordings which should be credited to a single pianist instead of the composer: http://musicbrainz.org/release/24f261f5-0126-4692-9f3e-1959684e52fb