In Destiny, there is further confusion regarding upgrading exotic armors and weapons with Xur. It seems that “old” exotic items, which drop after December 9, do not require this upgrade and come into the world as a “new” version, so to speak. Therefore, players should probably refrain from completing exotic loot acquisitions for the moment.
This turns out to be quite complicated. Apparently, guardians who have accepted a bounty with an exotic weapon at the end should be cautious. If you hand in this mission before December 9, you will receive an “old edition” of the weapon, which can later be “upgraded” by Xur. Those who hand in this mission after December 9, when the DLC “Darkness Awaits” is active, will likely receive the “new” edition of the weapon and will not need to upgrade it.
It seems that also the exotic weapons and armors that are already available will drop in the “better” edition when the DLC “Darkness Awaits” becomes active in Destiny on December 9.
So in short: Do not upgrade exotic weapons and, if possible, do not “find” or receive exotic weapons as rewards at the moment.
@montgomery_rich Yes. Hold it!
— DeeJ (@DeeJ_BNG) December 4, 2014