#1 No OSD for volume level. The entire onscreen display functionality is pretty poor in my opinion.#2 Yes. I do the same thing. But I use the Pioneer iPhone app to select Zone 2 and use the Apple Remote app to stream music from my iMac or iPhone. I don't know if you can select Airplay for Zone 2 from the receiver. I assume you can, but haven't tried it.#3 Yes, I'd buy it again. Aside from the complicated remote control, I really like it.