Firstly, about the changes related to Liesel. At the beginning of the film, Liesel's brother dies with two eyes both open, in Mum's arms. But in the book, it said he died only one eye open, in Liesel's arms. I think it was showing the fact that it wasn't exactly a natural way of dying, which relates to when death was explaining itself and how he had an eye on Liesel.
Next about the changes that were about Max. In the movie, while everyone was hiding in the air raid shelter during the bombing in town, Max actually came out of the basement and came outside. Even though that scene ended