I don't use Control4 but am following this issue because it is an indicator of Sonos strategy/expertise in Connected Home technology in general. From what I understand it is not recommended to use the endorsed drivers in existing Control4/Sonos installations. You should stick with the old drivers to avoid losing significant functionality. For new installations I think most dealers are using alternatives to Sonos rather than deploying the endorsed drivers and then have to deal with unhappy customers. If a customer is dead set on having Sonos in a new Control4 installation you are going to have to accept the endorsed driver limitations.
Local music library with carefully constructed playlists - no shuffling!, Integration with Homeseer Automation, No touch screen devices, No streaming services, No Apple products ever