To gauge interest...
What if you had the ability to "Forget" a series for the purposes of Next Up display. That is, it would no longer show in Next Up - unless you watched another episode.
Sometimes you maybe watch a series for a while and, even though there is more of it or more is made later, maybe it isn't as good as the earlier seasons or maybe you just don't have time for it anymore. So you'd like it to quit showing up in your Next Up list so it is less cluttered and you can focus on the series you are actually watching now.
If you start watching it again, the "forget" would be forgotten and it would start to show up in Next Up again.