I haven't read the book so I don't know the characters like you do, but I have read other books by that author and I hope they make other shows or movies based on some other books of hers!

Shailene Woodly to me is just not a great actress. I always feel like she's just reading lines out of a manuscript, and I agree that the big reveal at the end wasn't all that. But overall as a show I think it was fairly good in comparison to other shows on air right now.