@lollipopguild...great question. I’ll ask one of the programmer/techs. I know that 99% of the people I have talked to, say they hear an increase in sound quality, so I’m not sure. It might have to do with "where" in the digital signal chain the volume is controlled from, but I’m just guessing.
I know on my WiiM and Bluesound app, I could also control the volume, so Qobuz Connect is still a more direct access than a 3rd party...
Also, both the streamer's software and Qobuz Connect software have to work together, so there will be a few bugs and tweeks to work out along the way from both ends.