I am not sure I like this. It would mean I would have to read other series of his that I do not like to understand why a character acts the way they do in a series I do like. It is an interesting idea though.
I just reread Elantris, and while I liked it a lot on my first read (and I still do), it's a bit easier now to stop how much better Sanderson has gotten. I've a friend who really dislikes Elantris and Mistborn, because she thinks they are too artificial. He doesn't do a great job of hiding the fact that he's made everything up; it just feels constructed and in Elantris in particular, the characters feel a bit ... flat.
That is most definitely not the case with The Way of Kings and Words of Radiance. Those books are so much more well-written in all aspects, but regarding the characters in particular. It's amazing how much better he's gotten at writing characters that feel real and alive.