Android 7.1 (API Level 25) supports app shortcuts in most launchers. I think it would be a very nice feature to have spotify define these app shortcuts based on a user's recently/commonly played playlists. Or you could even allow users to specify which playlist's are shown as shortcuts. I personally only have 2-3 goto playlists that I listen to in the car. And majority of my Spotify App Experience is navigating to these 2-3 playlists. If I had the ability to simply click a button to go straight to one of these playlists, then I would be so happy.