Despite a lot of traditional content (like, chasing a lich-king) the first part of this adventure path is not to be considered "old, boring and predictable".
Instead, I think that Paizo really is successful by combining a thematic frame with cool, and challenging encounters! Everything is not what it looks like…
I do hope that the remaining parts of "Carrion Crown" is as successful combining drama, action and horror, but whatever the other parts will be like: "The Haunting of Harrowstone" deserves a closer inspection if you are looking for a great module.