Ideally it would work in concert with the original voice macro system style of PS1. An example would be if your injured and aim at a medic and press a certain key you yell "MEDIC!!!" or something similar. As powerful as the original PS1 voice macro system was, there were times it felt cumbersome and slow to me. Both systems could complement each other nicely if designed well.
I would also like to see some humorous "automatic" (possibly have a toggle to turn it off if people really hate it) chatter among squadmates. Examples (notably lame examples at that, I'm not a writer):
- "Nice hack" from the nearest squadmate as you finish a hack.
- "HACKER!, get on this NOW!" from the first person in a squad that approaches an enemy hack point.
- "Blew his head clean off" for that awesome head shot you just got.