I think as many others I would love to be able to use Spotify connect to start music directly into groups.
Echo Devices from Amazon are shown in Spotify Connect but also the individual groups that are existing.
So my request to Sonos would be to let the central Sonos speaker which might also be the Ethernet connection for the Sonos net also cast speaker groups for each existing group and also always keep each individual speaker shown in Spotify connect instead of overwriting it with the current grouping since someone might want to split up this group within Spotify. Specially for guests it’s more convenient to use their Spotify app instead of having to download the Sonos app first.
i am aware of that Echo devices report themselves over the cloud instead of the network but I don’t see there any problem why this shouldn’t also work for Sonos to report virtual speaker groups over the network.