Totally agree. I love his lectures on writing which you can find on YouTube. He's a great teacher with excellent content. But great teachers aren't always the best writers.

I decided to try the Mistborn trilogy. The first book was great - a nice tight and satisfying story. But the second and third books got progressively messier and I found myself totally disconnected and eventually just slogging through to the end. I wish I would have stopped after the first book.

Sanderson admits loving to write write write and hating to rewrite and edit, which I think really showed in the latter books of the trilogy.