[StavrosK]

This is semi-unrelated, but would a more robust/portable playlist format be of interest to your project? I wrote a spec for one and am trying to work with projects to implement it in one:

http://universalplaylist.stavros.io/

I tried to write a beets implementation, I got rather far but it was cumbersome because beets is more of a library manager than a playlist manager. That meant it lacked playlist functionality, which meant I'd have to write my own playlist manager, which was quite a bit more work than just the import/export plugin :/