Going to the same route as WoW. The game is TOO easy

[Neoyoshi]

It is true that most of the game isn't very hard, but then a large majority of players do not want a very hard game.
For those who do want a challenge, there is always the Savage and Ultimate fights - that's why they exist.

I couldn't have said it better.

Speaking from my own personal experience, 99% of my guild quit because Cata Heroic dungeons were harder than WotLK raids and the gear rewards for those super hard dungeons were disproportionate to the difficulty involved. On top of that, starter Cata raids were on par with WotLK hard modes. The leap in difficulty was simply insane.

I remember that so frick'n well, i had to get back into the habit of creating different types of Mob/boss pull macros again in Cataclysm because Wraith of the Lich King had very much eliminated and scaled down so much in contrast to TBC.