In this video, popular Destiny youtuber Ehroar is talking about an idea of his for a Xur update, but in it, he glosses over how exotic weapon's don't drop in the Master level Nightfall Ordeal, only exotic armor (for your class of course).
Is that true? And does it apply to Legend as well? If so that is completely unacceptable. Getting exotics to drop outside the nightfall is hard enough, and the chance of it being the only world-drop exotic weapon that up-to-date players don't have (Monte Carlo) is tiny. I can't think of any reason that farming the Ordeal shouldn't include world-drop exotic weapons as its loot table.