As I surely already wrote, I personally use AP2 as another music source and distribute it through my B&O devices via Beolink.
Why? Because controlling AP2 multiroom is not as convenient for me than controlling Beolink multiroom. I can join, leave a Beolink multiroom experience, change tracks forward/backward directly from the devices themselves (except with the M3) or from their paired remote without the need to carry a smartphone/tablet or to speak/repeat/shout to a voice controlled device supporting AP control.
I usually start music from an old iPad mini running Plex/Plexamp or Deezer as both have far better UI, and reacher search/play options, than the B&O App. I can then join any B&O device in my house to the music experience with the help of a simple physical touch on the device itself, and music starts within 3 secs. If i want to change track, I don't need to go back to the iPad, a simple touch/swipe on the device itself also does the job. If I want to listen to another source in this particular device, assuming it is part of the device locally configured sources, a few touches on the device itself and I'm where I want to be .... all these without the need to constantly use a smartphone/tablet/voice controlled kit. This is what I like in the Beolink ecosystem, simple, efficient and a good relay to AP 2