My raid group clear Normal Nerub-ar Palace tonight and rolled on various loot (I know there was a Sovereign’s Disdain in there somewhere and I myself got the enchanting recipe), but while we all left the raid one person stayed behind to watch the cutscene.
After the cutscene ended, the one guy made his roles, but while he saw who won everything, no one else in the group received a notice nor the items they won. The items were not mailed to us either, so it appears no one in our raid received anything for clearing the final boss