I'd like to see the widget be more functional. I have it on one of my screens and while it does show what's playing it would be nice if it had some features when things were not playing - right now it just is basically a link to the app.
For example maybe have it show the last few albums or songs you played so you can skip right to them rather than having to launch the app.
Or a button that takes you to the track list of the album of the song you're listening to. Maybe a widget function that allows you to swipe to the next song.