EDIT: a 1st beta will be available by the end of the day.
FYI the Custom playlists will soon be improved.
Filters will be available so the selected category can only show episodes based on their download status, played status, stared status, publication date, …
I get it that some of you want multiple playlists were episodes can be manually added, but there’s no plan to implement this for now.
However, according to the feedback I got by email, it looks like those filters will solve limitations of the current solution for most users.
Feel free to send me some feedback by email if you have ideas for other filters that can be implemented (Settings/Feedback/Email)