In Wrath, I got my wish. That wasn't easy, nor did it mean I was overpowered. To be the Hero I had to be the best, I had to put everything I had into my game "on and off the field". When not in raids I spent many hours a day researching, thinking, planning, improving. In raids it was always clutch time. The edge-of-my-seat thrill that if I missed one heal, hesitated for one second, someone would die, and we would all fail.
In cata, thats all gone. In its place is a sort of artificial difficulty where the only win I can have is to manage my mana. In a raid I no longer care, because there is nothing I can do. No matter how hard I try I can never be the Hero I wanted so badly to be. All I can do now is fret over my mana, and if the DPS die? Screw em, they failed. If the tanks die? Well there's nothing I could do anyway. I have no drive left, I just sit in the back and stare at that mana pool.
To add insult to injury... I can't even be the best.