Yeah I was pretty bummed when I found out that only my fireteam could hear each other. Especially considering all the cool effects they have if you set the chat sound to come from the speakers, like echos in caves and radio static at far distances. Running into a random person and dancing is fun and all, but I think it would help the immersion and communication if there was global voice chat. A scenario off the top of my head is running into a person in the level and he yells to us for help because there are high level enemies attacking him whereas normally, we would just pass him by cause there's no reason to think he needs help.