A few things I would like to add to the wishlist:-
1. Volume control for bluetooth devices that don't have a volume control built in. This is for devices that play From the B2.
2. Random play for individual albums, rather than having to put an album into a playlist!
3. Turn off unit from front panel when playing Spotify. Particularly useful if I go out and leave B2 playing from Spotify, my wife could then turn it off. Unit will not turn off when playing Spotify!!!
I'm sure I will think of more, but these would make my listening pleasure much greater.