I’m crying with you…we have several Sonos Play 5’s & Play 1’s throughout the house, as well as Sonos Subs… I was excited when I read that ST integrates with Sonos, but after two years of waiting, it is still a grade of D-.
The ST integration to Sonos is very, very crude and playing Text to Speech is very disruptive to the “Party Mode” groups, stereo left/right pairs, previous playing levels (e.g. Mute, Volume, Playback status), playlists, queues, etc.
I have decided to eliminate all but the basic “Play, Pause” controls that the Sonos Control Tile provides…
Luckily, I have developed a custom non ST means for playing Text to Speech on selected events. The program snapshots the current Sonos environment, plays the TTS message, and restores the Sonos to where it was before the TTS… Unfortunately, this set of programs is very tailored to my home network and Raspberry Pi server…
I have seen posts from ST Development that they are awaiting new API’s from Sonos, which I will be 6’ under by the time they release something workable. 
Continuing the discussion from [RELEASE] Rule Machine: