The last set of 3 hardmode dungeons at least had unique looking sets - this time we got a year old, outdated gear that's been in the game since launch. And even this gear, which used to be obtainable much more easily than it is in 2.4, its only use now being vanity, drops rarely as you get crafting materials most of the time - and even if it drops, everyone can roll need on it which cuts down on the chance of obtaining a piece you actually want even more.
This seems to suggest that SE doesn't consider the current hardmode dungeons worthy of having loot tables worth mentioning, probably because they don't consider them challenging enough to yield actual rewards besides just the weekly tome cap.
Removing a year old equipment from tome and seal vendors just to put it in the new dungeons really feels like an insult, and I hope they'll reconsider their stance on 4 man dungeons.