Playing the last couple of days, I noticed, that people's voices over VoIP are extremely quiet. Unless they are standing right behind you, you can hardly understand what they are saying.
Also, when playing with friends over Teamspeak, we noticed, that the voice quality ingame is so bad, that you can't even recognize your friends.
I suggest increasing the radius of VoIP a little and making it louder. And if we could get a better VoIP-codec, that would be great, too.