I've been reading TP for twenty years, I own and have read everything and I've always enjoyed the 'The Science Of' books, including the science bits I hasten to add. Without providing spoilers I will say the story arc fills roughly a third of the book which is disappointing. If like me you are an admirer of the works of Spinoza, Dawkins, Hitchens etc then you know how this plays out, contentious to some but for the likes of me, preaching to the converted if you'll excuse the awful pun.
I have to add that the Discworld story feels different in places, barely enough substance before the next chapter takes us further away (possibly written in part by a certain daughter perchance?)...I guess I wanted more which is probably a selfish thought I am sharing.
Still, any TP is appreciated these days.