Can you talk with any of the people outside of your squad in any circumstances? The only thing holding me back from buying this game is the fact that in the demo you could only talk to your other 3 squad mates, not even proximity chat? really...

 @LRP21:  Squad chat only I'm afraid.  They think it'll be too chaotic if you can here everyone and want you to stick close with your squad so you can watch each others backs.  If you don't join a squad though, you can talk to everyone else who isn't in a squad (but you won't get squad bonus xp).

Interesting, so you can have a team of 12 people squadless?