One of the things I like about the Lumin app over BluOS is adding multiple songs that are not in order on an album or playlist to the Play Queue in one go.
In the Lumin app’s settings, I have “Tap on Song List” = “Double Tap” and “Play Now”.
This allows a multi-selection playlist-building process that makes it really easy to quickly build a play queue. With this setup, I can bring up an album or playlist in Qobuz, single tap on all the songs I want (tap again to unselect something) and the “Add to Playlist” bottom menu appears with icons for Play Now, Play Next, Play Later, and Play and Replace.
The support page for the app was usefull at figuring out what some of the icons meant in the UI:
http://www.luminmusic.com/support-app.html
I also like the popup you get when pressing and holding anything (album, song, artist). Tap the thumbnail of the image in that popup and you get the high-resolution artwork full screen.