Legion: Skin Deep

I'm starting to think Brandon Sanderson's writing might just not be for me. I always like the story ideas in theory, but I always feel like I'm reading a adult novel with the writing of a young adult novel. Everything I've read so far has been prioritising plot over character (my personal preference is usually the other way around), which makes the characters feel a bit too shallow to me, and so in the end I just don't care about anything going on.
I don't hate it of course, but feeling neutral at the end of the book isn't a very good sign either.