Being able to change items incorrectly categorized as Movies into TV and vice versa.
Added on May 5 19:44
Well, on IMDb you can determine the format based on the formatting of the title, which listal's scraper could be made to analyze. If a listal user wanted to change it, they could do so at IMDb, which is an arduous process designed to force users to really look into things and be certain of changes they want to make. Then a request could be made to re-import the data from IMDb.