I've found more than one thing that's extremely annoying when using Sonos.
1:
If you are playing music from spotify and you have set the volume for different levels in each room and want to adjust the volume by turning the volume up or down it will set the volume to exact same level in all rooms.
On top of this you can't adjust eash room volume in spotify so you have to try to find your way back to the main menu in the Sonos app
2.
After the latest update to the Sonos app you are not able to choose "genres" in spotify in the Sonos App so you have to go through spotify's app. This will result in more annoying phases that relates to topic 1.
3.
You can't ask google or alexa to group rooms. So when I ask Google or Alexa to play music on Sonos it will only be in that room. When I go to the bathroom I can't ask Google to play the same or group with the other rooms.
I just can't seem why Sonos is not doing anything about this. It should be so easy to program.