What's Wrong With (my) Windgrace?

I've been playing Windgrace since he came out and I've been suffering from what I call "New Stuff Syndrome". I'll see a new card that would fit into it and jam it in without taking a real look over to see if it's ACTUALLY worth a slot. Now I'm at the point where the games don't run as smooth as they should and I feel like a dunce for not being able to figure it out.

My first thought is likely too many lands that make colorless or come in tapped, pr perhaps my payoffs cost too much in general. Thoughts, constructive criticism?

http://tappedout.net/mtg-decks/junior-wundo