I love the book though, and I enjoyed Villevenue’s adaptation because it was exactly how I visualized the book when I first read it. However, having such a direct adaptation means you inherit the flaws as well — in this case some dryness and the pacing issue that you mentioned.
Also I think dune is purposefully written in a particular way because one of the themes of the book is the disposableness of life and this is what the fremen oppose.
https://geektyrant.com/news/dune-messiah-reportedly-greenlit...
The Sci-Fi channel did a Dune miniseries, that I thought was decent.
The other problem is that Paul is a complete failure. He topples the emperor, but doesn’t have the courage to do what he knows he actually needs to do. His son picks up the mantle after Paul turns into a desert wandering vagrant. So ending at Children would probably also be a bit confusing for a film audience.
I do think there’s a major challenge in adapting Dune, which is that Paul’s arc is just starting at the end. The narrative tension doesn’t let up until three books later. If you’ve only got one movie guaranteed, morphing it into a more-traditional hero’s journey isn’t the worst way to solve that rather large problem.
I’m curious how Villeneuve’s going to deal with that.