I’d like to request the ability in the app to turn off the surrounds completely when listening to music. Currently the lowest you go can is Ambient/zero, which still allows some sound to be audible from the surrounds.
I’m sure there are users out there who would enjoy the reverse as well, where you can keep the surrounds on for music, but mute completely for TV/Movies.
My setup includes an Amp, 2nd gen sub, and Ikea Symfonisks for the rears.

… I know some here also occasionally ask for the option to ‘mute’ the front and center channels, for music playback just from the rear-surrounds only. In my own case, I prefer the soundstage out in front.