Now that there is some trouble with the Spotify Connect, I have been using the Sonos app. There are two things that I'm missing from the Spotify app:
1: A dedicated shuffle "button"
2: The option to "reverse" the playlist so that the newest song added is on the top. In the Spotify app you have the option to choose "newest first"
Maybe these things are already there, but I'm too blind to see it..?