Also see MBS-1177, but I'll copy the issues relevant for this ticket here:

Advanced tracklist editor

• Use direct search button, again
• No text indication what the 'add track' button does. I didn't know until I clicked it
• Disc title doesn't make it clear that this is optional
• Guess case button on each row doesn't make it clear what it is (I used the changing anchor text to work it out)
• What does 'Use tracklist' mean?