I really liked the voice chatter in CoH, it was the best I'd heard in any strategy game. It really gave the feeling like you were in the battle whenever you heard your soldiers talking, it also gave you a sense of how the fights were going depending on what they said or their tone. Not sure if radio chatter for battles was ever brought up as a suggestion, but I would like to hear it in game.

For instance if you were zoomed out overlooking a solar system and there was a battle going on, you would hear faint radio chatter, and as you zoom in to the battle taking place it would get louder and more violent. To where you feel like you are in the battle at the very closest. Of course if the battle was happening off screen you wouldn't hear it except for maybe random static.