I agree.
Being able to send the audio channels to separate outputs that you select (main default output / headphones output) is a great feature of P3D.
I have most of my B737 sound going to the main speakers built into the cockpit shell and then the ATC radios to two overhead speakers and pilot's headsets.
Presently, because GSX only presents one audio stream I need to send it to the default audio device. Great for most GSX sounds but the Ground communication is heard booming in surround.
It would be a 'nice to have option' to send ground communication, and maybe the dings, to a separate output in GSX. :-)
Aussie