Well, it's better that then nothing. As of now nobody can talk in the tower. So really the only reason to see other people there is to see their snazzy attire. Lol and dance with them.
English
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I communicated to other players, pointing out chest locations and ghosts by waving and pointing, it can be done. (Fireteams can be done by clicking the stick and sending them a message via XBLIVE or PSN
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I'm only talking about in the tower. Going through everyone in the tower one by one private messaging them for a raid group up is a pain in the ass compared to having a public chat and simply typing, "anyone down for a raid?" Simple. A small little box on the bottom of the screen somewhere.