All the shout outs I've heard have been useful like "I need ammo" or something letting you know that you can help them. I can only assume this will not be present online, as the human players should speak for themselves.
Speaking of sound, weapon sounds sound amazing from what I've been hearing lately. Much better than what i had been expecting.
only people on your friends list can hear you. so you'll still get the shout outs online as well
This is true.
last i heard the humans can talk all they like but you wont hear them
the game defaults mic users to mute.
This isn't.
Voice defaults to friends only, and yes, the "autopvssyr" as they call it will be present online.
Players will call out "low on ammo" a while before they need it, though, so the Soldier comes to them on time instead of late.