I am not sure how it currently sorted but would like to have ways to define how up next is built.
Building an up next segment based on:
Items You Are Watching (Currently Airing)
Items You Are Planning to Watch (Premier Filter) [eg. Items that have premiered in x days
Items You Are [Re]-Watching (Available seasons finished airing) [Last Watched / Last Air Date Toggle]
Being able to sort these in any order you want would be a big unlock.
