I am a prepium user and one thing bothers me is on mobile it cannot play by the natural order of track but shuffle.
It's very disturbing when listening to musicals, classic music and movie soundtracks. I usually put entire albums of such music into its own playlist, yet being shufffled all over the place really distrupts the listening experience. Imagine listening to the ending of a musical and then being shuffled directly to the overture.
There should be option to play music in natural order.