I understand in concept what your wish is attempting to accomplish, however, how would it be implemented. What exactly do you expect the pilot flying overhead to receive on his voice channels? Tunable VOX, triggered by the T key and Local VOX triggered by F12 key and now you add air to air priority vox channel triggered by “x” key and vehicle to vehicle priority vox triggered by “y” key. So at any time, you might have 4streams of conversations taking place . I guess I’m not seeing how that helps.
Also I don’t think the problem in the game is with a lack of channels for communications, it’s the nature and content of the communications that already exists that causes the problem. People lack self-control and rarely practice good communications . The 113th Lucky Strikes uses a squad vox and we practice family friendly voice communications. We use squad text for none game chat and vox for squad operations. I do think there is merit in having a local channel that is de-tunable. What might be a good approach is to have a tunable vox channel, "T" Key and make f12 tunable as well, a standard operation might be that on each side/country the f12 channel might be tuned to the local field ID where People are operating out of. An example, Pilots and GV's operating to defend A6 would tune the F12 vox to A6 or not tune it but leave it tuned to Off. Pilots attacking V243 might decide to tune the f12 vox to V243 for local vox communications or again decide to have it turned off.
Again I see the major problem with communications in AH not being a lack of vox channels but the lack of self-control of the AH base of players.