What if.... the Heroic dungeon dificulty was left untouched like it was at launch before the major nerfs, they eliminated de 10m hc or at least made it like LK with lesser loot, and other stuff along these lines?
Personally what totally spoiled Cata for me was how bad Dragon Soul was, specially the last fight, spine was still kinda cool, different concept at least. The previous raid tiers and raids themselves were decent imo.