There's definitely some MMO tidbits here and there.
But communication wise, Destiny is far from being a MMO.
English
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It's there, just badly done. It just takes a ton of willpower and patience and luck to get Someone to join your firesquad so you can communicate
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One of the big issues with Destiny is the inability to chat with other players you meet at the Tower or while exploring. Proxmity chat will greatly improve the game's social aspect. Alot of us have to rely on meeting strangers in the game to form a fireteam. I've been soloing for the most part since I can't talk to anybody because Bungie was afraid that somebody would get too butthurt over a 12 year old trolling.