Spotify has quite a few of the features you're looking for already. Why reinvent the wheel? It costs about the same as Apple Music, and I have very few complain

Spotify has quite a few of the features you're looking for already. Why reinvent the wheel? It costs about the same as Apple Music, and I have very few complaints with the apps and desktop client. There's also quite a bit of IFTTT compatibility and a (from what I've heard) decent API.