What if I told you that Blizzard does this on purpose? What if they buff and nerf various classes and specs randomly so that we become more passionate about the game? This way we stay interested, look through every single change with a microscope, create insanely powerful simulation programs to determine the effects of the change, write endless tirades on forums, review endless websites and keep calling Blizzard a bunch of idiots who have no clue what they are doing.....all the while Blizzards just keeps raking in the cash.
Welcome to corporate America folks