Some Legendary items are insane. Some specs have no good Legendary items while some have godly ones. Many Legendary items feel like an ability you'd receive at level 32 and you didnt even notice you got it because it does next to nothing and does nothing to change your gameplay.
I think Blizzard needs to take a long hard look at Legendary item power and balance. They need to get ideas from high-end players as you can really tell Blizzard is completely lost when it comes to what makes some classes/specs tick.