For those that want those asinine emotes, they can put one dpad button to use to open a small emote menu that you can chose from. This should actually allow destiny to add more than just the original 4 (maybe you can buy different dances later from a vendor, or a new salute, etc.) and it frees up 3 new hotkeys.
But first and foremost, make this game the social environment you promised and add some freaking communication options!
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I agree needs more social aspects and buying dances would be a cool addition