I know he had been having a hard battle with this - with much pain and frustration. So in that way I am glad he is no longer suffering.
But dang! Now i'll never find out what happens to Rand, Matt, Perrin, & Elayne. The Matt/Tuon story was really getting good, too. And i don't think there is any way someone else can pick up his notes and finish it off, either. He was just too good.