Players can chat in the lobby, with their own battlegroup.
Players can join a global chat group (common to all servers) to ask questions, look for groups/squadrons, or socialize.
I find that whenever I want to say something useful to my team while playing it takes too long. Just typing something isn't that useful. I want to replace typing with a set of premade commands that can by accessed by holding down a button (shift?) and clicking on the options with the mouse. These commands would broadcast messages to other players (with VO when I get a chance) and put visual indicators in the game world that only my team can see.
I could then sell taunts/gloats which would be nice (for me anyway)...