I use the dual channel feature on this sim with the aircraft noises going to a pair of loudspeakers and the avionics and comms going to headphones. It gives a fairly realistic combination. However, it would be very nice to be able to use the “Speaker” button found in some form or another on most of the aircraft to be able to send the avionics / comms sounds to the speakers as IRL. This would enable crew to remove headsets during low workload parts of the flight such as the cruise whilst not risking missing a broadcast from ATC or another warning from the aircraft.
Now, I can do this myself using presets for my sound card that I run from a small tablet with OSC that allows me to merge the channels but I know many will not have this capability, it doesn’t feel like it should be a huge job to implement (though my programming knowledge is just scraping intermediate).