Honestly, even as long as the movie was, I felt like they could've added another thirty minutes worth of material to make it an even three hours to flesh out the characters and add more clarity to some points made in the movie. The theatrical cut for The Fellowship of the Ring ran 178 minutes while ran a relatively paltry 156 - just twenty minutes could have pushed the movie lightyears ahead.
The movie is a trailer for the books.
It's as good as it could ever be, considering it was in the making for 40 years [0].
[0] https://www.hollywoodreporter.com/movies/movie-features/dune...