Ridiculous, TBC had a lot of shitty dungeons. There's a reason why it's the worst part of leveling 1-90. Blizzard took the multi-wing instance thing too far and we got oversized repetitive dungeons like Auchindoun with recycled assets and bosses, don't tell me that crap was so compelling. And back then there was no random heroic option, so everyone just did Mechanar... so what was the point of having heaps of 5m bosses if people all did one dungeon?
WoW is just old, buddy.