@pedz
I'm on the same point. Until i had my multi connection bluetooth I worked the same way. The problem now. It does not work that nice.
I try currently to switch back. But my goal currently is using my #Kodi Mediacenter. But Kodi sems still using alsa. It was a hack to get simultaniousl y output with a bluetooth speaker. (For Radio in other rooms)
I gave up this network audio setup for Kodi.