Comments, which I hope Hitech reads:
1) I hate to lose channel 1. The concept has been in all the good flight sims since Air Warrior in the early 90s. I used to enjoy communicating with other country players who typically flew at the same time I did. Plus, we got to make witty jokes about sheep. Frequently these conversations would take the sting out of being shot down, and were therefore a positive factor. Of course, there were always *******s, but one can squelch them.
2) The idea of having radio channels work only over a limited range, mentioned by someone above, is a good one. It would greatly reduce irrelevant (by virtue of distance) radio chatter.
3) Regardless of the final decision, I think AH1 and AH2 are a great achievement (Hitech, Pyro, et.al.). More than fills the gap left by the demise of AW.