If you've come across a rare while doing dailies in Isle of Thunder, chances are there are others there too. With the new changes, you can be eligible for loot if you help out with the kill. You might've tried to loot the corpse afterwards only to receive nothing. If this happens, make sure you go far enough away that the corpse disappears, and then run back so the corpse reloads on your screen. Now try looting it and you should have something.