Perhaps the publisher put pressure on the author to include these passage so that the book would be more accessible to new readers who had not read the previous books?
From what I understand, each book of The Fall
was intended to be stand alone. Except in reality, there's clearly a progression of information being given to the reader. I feel like writing each book like it was its own little island was a huge mistake for this kind of story.
Since Peaceable Kingdoms
has to wrap up all loose ends, it ends up going through tedious amounts of over explaining to cover all its bases.
I also got the sense that some storylines were pushed to the side so that not a lot had to be explained about them.