I have v3 on my RPi’s and one issue I see is that when I run Audirvana on my Mac and use UPnP to Volumio on the Pi, I don’t get the feedback on the time and it just seems slow in general. I tried both versions of Audirvana too. Under the old Volumio it would play and keep track.
I’m considering using just Volumio but I don’t feel like the Qobuz interface is as good. There doesn’t seem to be a filter that you can apply for the 14 genres that they use. I usually checked them individually for new releases based on my mood. Rock, Jazz, Classical, Blues, Folk, even if most of the others I ignored. There also isn’t a “Play Next” option, it is either play now or add to the bottom of the queue. I’m not particularly happy with the new AV Studio interface either, the old Audirvana seemed to be better with it.