Cata was too hard? I ummm, well... The heroics were decent at the beginning but after DS released they became mute. I noticed this with Wrath but at a much faster rate, in Cata all the content became much easier after they released DS and you didn't even have to touch Firelands. Really Cata wasn't that hard, I went in DS heroic without ever touching Firelands and laughed Deathwing's face, it was trivial.