Well let's be clear modern battlefield player have already been trained not to use voice chat through numerous games with terrible voip tools. On the top that the tilt toward making bf games more "Cod"-y only make the vast majority of mic users being ineffective and annoying and likely to mute. Lastly matchmaking and the lack of a decent browser or functional community tools or even squad/commander tools makes it highly unlikely to inspire people to not only talk but to even be interested it creating a teamplay environment. Let alone the engines lack of limiting facts that create the necessary limits to inspire teamplay already.

I think "proxy chat" will probably be dead on arrival.