Truth is each expansion has been worse then the last in some major way.
Cataclysm at least didnt have the stupid pandas in an asian cash grab; Wrath at least didn't have the cheap and lazy rehash raids and reused world and you know GOOD PVP Balance!; TBC at least had a proper raiding setup that kept out the scrubs and a proper arena setup that did likewise!; Vanilla at least had 40 man epicness and loot that was great in all parts of the game instead of being fractured into pvp or pve only!
Naxx says Hi.