I'll say it now, Cayde-6 needs to die to bring some conviction back to the story and give the player some reason to fight. But, if we have to have the ghost talk for the guardians instead of them actually having a voice and true feelings for the loss I'm afraid it'll just feel empty and half baked.
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Considering bungie put the most significant part of the story into the trailer, I believe that speaks volumes as to how important they think the story is! So I very much doubt a line will be uttered from us!