Sadly, Sonos has proven that it is unable to create a good mobile application.
Instead, it made the life of everyone worse. It also did not comment on rolling back to the previous version, which worked well.
Sonos should focus on creating things they do well: hardware.
Sonos should open source the protocols to connect to their speakers and provide stable apis to work with them. That way, open source developers can create their own products that work with Sonos. None of us users is then forced to deal with the bad decision making that happened.
Sonos: please rollback to the previous version first. Make the protocols to connect to your hardware available free and open source, so we users can build or use alternatives.