I saw something interesting in the Blueposts today.
How does Supreme Lord Kazzak ilvl loot work? Is it based on your progression in HFC or just a tooltip error in journal?
This made me think, wouldnt it be nice to have worldbosses stay relevant? It would work like the raid caches from the garrison. Do a few heroic kills, and you get heroic loot from the Worldboss, do mythic, and get mythic loot. (you will need to have atleast a few kills on that difficulty in order to get higher loot from the worldboss.)
Keep in mind, VoA and Baradin Hold used to have Normal, and heroic loot.