I haven't found or seen any purple engrams ether. Since the patch I only got blue engrams, filled with lvl 14 things. Ok, I agree that we will not get legendary weapons and armor from every enemy, but I played two Story Missions on heroic lvl 28 and got only one single blue engram. Is Bungie kidding us? No loot and no reward? How do you want to keep us inside the game? In other games I doesn't know, where I should store all the loot before i destroy it, but this is rediculus.