Each time I hear some saying "bungie should also make the legendarys upgradeable" I think "wtf, what about farming again and earning it". I have played World of Warcraft for like 7 Years and there was nothing like "Upgrading old Gear". New Content means new content and this means you can delete all your old stuff and go for new one. So what was your intention to make it possible to upgrade exotic gear ? And will it also be possible to upgrade legendary gear in the future ?