Hi there @Lthomp 

Thank you for your feedback. The Sonos app is developed in conjunction with the Sonos team, but we're planning to work on a major integration update this year. So stay tuned, we want to develop a better experience 

When is this “major integration” supposed to happen?  Thanks.

MIke

You never really know as they run small teams.

The Deezer is small player in the scene, so it can take lots of time for this to happen.

I hope you will get some kind of estimated answer later on.

Thank you for listening your music on Deezer!

Very soon, Mike @Soultrain40 

We don't have launch dates yet as it doesn't depend just on us - it's an integration with a third-party device and app. So please stay tuned and bear with us, any news and we'll be sharing it here 

Any new on this? Just moved here from Spotify and realy enjoy Deezer so far. But I realize I am really missing acces to Friday Releases, Artis Mixes, Album Mixes, Playlist Mixes etc via Sonos

Correction: just realized artist mixes are working!

How about track mixes? I LOVE how well you guys do it and that it doesn't just give me tracks I've heard a million times. Would love to have on sonos. 

That was 2 years ago and still not done it. So many things that are clunky and/or impossible with Sonos

Ähm… there WAS a big update on Sonos integration for Deezer last Summer. Sonos made changes to their API that allowed streaming services to have a improved look and feel. 
Deezer is one of the first services using the new api features. Now for example there are the flow moods available on Sonos. Besides Deezer can be used as a standard service working with Sonos voice control. 
I think they still are working on supporting more content from within the Sonos app, but at the moment imho they are concentrating on deezer connect integration also for Sonos.