For difficult to match albums for which a musicbrainz or rovi (allmusic) ID is known it would be cool if a search for that ID would be possible.
It might even work by entering something like
mb:<musicbrainz-release-id>
or
rovi:mw999999
into the artist or album title field in the identification window so no additional GUI stuff would be needed.
What would be nice: if Roon would strip the the - from the musicbrainz ID if necessary, so copy & paste would be easier (from the exports it looks like Roon doesn’t use the - internally in musicbrainz IDs).
This would help when one knows the album exists in one of the metadata sources but the current credits (from file tags) will not bend to what Roon has in it’s database as identifiers.