I think "Documents" and "Passage Lists", in reality, serve the same purpose and could be combined into one function.
So combine the two functions and add the ability to have "headings" as in documents and add ability to have a note within the document.
I know as I write this some will disagree... but just stop and think about it. It really makes sense.
I think this would help to have less "bloat" in Logos software. 