I read the books years earlier, and thought they would be largely unfilmable. Few even tried e.g. the animated adaptation from the 1970s wasn't completed properly. So respect to the screenwriters for making some necessary changes without doing a Hollywood hack job on the story.

If you're used to a conventional 3-act structure over 2 hours, I get why you'd think the movies to be slow. But we're now in an era where film-makers don't have to lock themselves in to conventional movie constraints: you just see the results on Netflix as a 10-part miniseries, not in the theaters as a movie.