I think a nice feature would be to make all the headings on customize sortable by ascending and decending by clicking on the heading. The title, playtime, chapter, aspect ratio and format. That way I can for instance sort all by playtime and delete the short ones. Or sort the titles in order so I can see where they go together more easily. A lot of deleted scenes will be grouped together and I might get a trailer mixed in with a deleted scene when I would prefer to just delete the trailer.