I was surprised by the distance between the reader and the characters. We can not clearly identify them or appreciate them. They are just actors in history but do not have the consistency of a Shirley Mollison or Albus Dumbledore. Instead, Rowling even falls into the stereotype. The gay stylist dying mother at the head of a fortune, inspector fallen and grumpy ... Yet she had accustomed us to meet very rich characters even for the secondary (Remus Lupin, the Weasley family, parents Harry etc.).
We could then deduce: the story does not give much room for characters then it is action-oriented. Again, this is a disappointment. Paradoxically, this is a very well written novel, but the length and pace of the narrative saddled reading. 464 pages in which some passages are (very) long and boring. After "settling", I can say that only two passes bounce history. For the rest, it is very linear and mostly the scene takes place through the view of the Inspector Strike with which it connects interrogation without ever really having "a bone", so to speak .
In any case it does not hold a candle to The Casual Vacancy (even if it is not at all the detective genre, I speak only in terms of narration).