My three biggest pet peeves are:

- You can't turn your queue into a playlist (and you can't see previous queue as part of the queue, only as limited history.)

- Clicking a song or album sometimes clears your queue and starts playing that instead (I know there is a logic to it, but a mistake or mis-click is easy).

- There is no shortcut to add to queue, just long press then find the menu item.

It's possible everyone else is only listening to albums or curating playlists then playing them, but I like to pick things as I go like a jukebox and it sucks at it.