Apparently, you can loot Melandrus (CoS boss) on heroic, but Vandros must be killed on mythic for the same tailoring questline? I mean, it's not a problem getting into a mythic grp or setting it up, but while farming murlocs for the cloth on the Broken Shore (again, part of the same questline) wouldn't it make more sense to be able to queue for both heroics? Or just make both of them require mythic?