I am a heavy user of the remove_perfect_albums plugin but I found it most useful to remove the album.is_complete() clause so that everyone would be removed that did not have unsaved changes, regardless of whether it was "complete" or not.  I often have added one track from an album to my library and don't want to have it left to look at unless it has changed.

It might also be useful to some how remove all the unchanged tracks from the results so that if one were to run the plugin and hit "save" the would not be rewriting tags to files that had no changes.  I can see where this could be computationally difficult but I'm not an expert on what can be done with the API.