They have added/are adding a "your music" section which is supposed to be much better than just having a massive list of playlists. I haven't seen this feature on the app yet so don't know if its still on its way or it needs to be kicked off on the desktop app.
Hopefully someone else can shed some light on this.
I almost switched to Beats Music because they have this feature already. But I found the rest of the Spotify interface and music selection to be better. I hope they add this soon. I'd love to have a Spotify library I can just shuffle all the time.