This is what Urk said during the live stream with DoD.
http://planetdestiny.com/another-vault-glass-chest/
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If they wanted people finding this chest maybe they should have at least upgraded the VoG weapons, and not made the armor obsolete the second the dlc dropped. I really wish they had done that, VoG is a much better raid than Crota, but I have no incentive at all to run VoG anymore besides something to do when I'm bored.