First off let me start out by saying this: MusicBee is phenomenal. I am amazed at the level of customization available and have been playing with the settings non-stop. I have finally gotten it to look how I want it, but during the time I have noticed a few things that are not there that could possibly help out.
1) Being a music management application, I was not able to do some of what I would have liked with the folder structure of my music library. It seems to almost stop at ID3 tags. I would love to see the ability to do manipulate folder names too based on tags like artist name, and year when adding music to the library or when moving things around. Maybe I haven't spent enough time with it and I've simply overlooked it.
2) The Now Playing and Track Information windows in general, but as a whole maybe the entire layout could benefit from a drag-n-drop, snap style interface with containers to position them any way you would like. The default layout is fine, but seeing how customizable everything else is, I thought that it would be nice to see something like that.
So with that being said, I downloaded the API to see if is is going to be possible. I'm sure #2 will not be, but maybe #1.
Thanks again for a great piece of software and I hope my donation helps in keeping it going.