Seems like it should be pretty straight forward. It has to do with the grouping logic built into the SONOS driver. If they just remove that part, and let the standard C4 matrix logic take over.

In fact, older versions of the driver included 2 different drivers for the SONOS players. One was specified as "Groupable" and one was "Un-groupable" or something like that. I cannot remember if it was v.7.x.x when they changed everything up and released the newer driver, and then of course V8 is all new.

They will figure it out I am sure. Those EV guys with the accents are pretty clever. Hopefully they are still on board after the buyout.