Keeping Faith, Jodi Picoult

Keeping Faith I never felt like I really connected with the characters. I was hoping 'God' would be an actual character, too, but 'she' was more of a mystery thru-out the book. Not only that, I never really understood the purpose for Faith's stigmata. I kept hoping Picoult would tie it all together in the end, but instead I was left going huh? I even read the last page twice trying to figure out the meaning.
I enjoy Picoult books but each one is so different that one never really knows what to expect.