So I will keep this short... I assembled a task force to work on GNOME Music based on https://live.gnome.org/Design/Apps/Music. Development is really coming along nicely.
Cesar Garcia Tapia had started a Vala development of it. We used lots of it in the new re-implementation which is in JS, this is due to the fact that.
P.S: I would like to thank Next Tuesday for sponsoring my time on this small codebase :D.
Here are the same screenshots in the "not dark" Adwaita