What I'm saying is the /say is NOT fine. It is NOT fine having to use out of the game tools to stay in contact.
As for voice chat, sure it could work, but..
1) Not all people likes to actually talk.
2) Sometimes you just can't due to people in your house sleeping, wathing TV, ect.
We already try to work around the barriers, but this is a suggestion forum, and I am suggesting some ingame tools to solve the problem.