be able to show list of completed/finished items
in the downloaded episodes you can hide "unread" items; it would be nice if you could switch between "all", "unread only", "finished only" and "partially only".
this could replace the "reading in progress" list.
I ask because I don't have automatic deletion on completion set up, so I have to go into the downloaded list and then find all the finished ones and delete them if I don't want to keep them.
In that case why don't you enable automatic deletion ? You can enable the trash that will allow you to restore episodes for a couple of days if you change your mind. You also have a feature that won't automatically delete starred episode. So just press the star button on the episode you're listening to and it won't be deleted.
Also from the downloaded playlist you already have a menu that allows you to delete every episodes flagged as read.