I didn't finish the TV show (I got maybe halfway through), but my main problem was the changes to Hardin. In the book, Hardin is a shrewd politician, and there's nothing magical or blessed about him. He "defeats" Anacreon by exploiting their own dim beliefs in magic against them. In the TV show, Hardin is a warrior with a special "magical" connection to the Vault. That conveys a very different, almost contradictory message compared to the book.