Lists: Add more sorting options

In addition to adding numerous films and shows to my Watchlist, I've created another custom list of material I’ve already seen. I’m doing this to become a better student of film and would ideally be able to sort the list by Director, Producer, Writer, filter what all items by Actor, etc. Currently the sorting options are Popularity, Alphabetical, IMDb Rating, Your Rating, Number of Votes, Release Date, Runtime, and Date Added - which is great, but what are the chances IMDb would add more?