Also, when it comes to compilations, iOS stinks. If I go to an artist or band who have both their own albums and songs on compilations, I want to see their work when I go to their artist entry. As it stands, I have to go to a different section to see an artists' songs on a compilation album.
This is one of those things that comes across as strictly an oversight. A symbolic one at that. It offers no utility whatsoever. I brought it up in an email exchange with an executive on the iOS Music app team and hoped by iOS 10 it'd be fixed (having assumed others had shared similar feedback).
Thankfully Marvis (and Cesium) both overcame this early on. At this point, I can't see even opening the stock app. My biggest concern is the star ratings. I'm glad they can still be adjusted in third party apps and by Siri, but I'm concerned it's a diminution that signals abandoning them completely in the future, which could mean breaking the feature in third party players as well.
On another note, has anyone deleted the music app to see how the phone handles music in your library? I assume that the Control Center buttons stop working.