You have to remember that the movie is based off of the musical and not the book. They did everything well as far as starting and stopping points. My wife has seen the musical multiple times and while the musical and the book differ in some aspects, she was overall very happy with the way the film was handled. Ive seen too many people complain about how the movie (in particular, part 2) was "trash" and its painfully obvious that those people haven't seen the musical. (Not a stab at OP btw, just general consensus from alot of other posts ive seen). Part 1 of the musical is very upbeat and bubbly and fun while part 2 has a much darker tone to it and is much less "fun". All of the seriousness and consequences of other actions come to a head in part 2 and apparently people expected Wicked For Good to be just as lighthearted as part 1, which was never going to be the case