They do that because they want you always to be doing something - making obviously (flat out) better gear is one way of doing it. WoW's drop system and WoW's updates are not entirely relate-able.
Though I played pre-burning crusade so I dont know whats new besides what is in their trailers they send me every now and then. (Cant remember much of dungeon loot other then I liked all the options you had for party/raid looting choices compared to FFXIV - its been a while :P)
