I'm waiting for Dune 2 to release to tell you.

Dennis saved a lot of the best stuff for the 2nd movie as bait to ensure he would get a second movie.

Dune is such a hard book to translate into a movie because lots of important dialogue that drives character growth and the political intrigue of the book is either Frank Herbert himself narrating the events, discussion or perceptions taking place in the characters' minds, characters talking imperceptibly with their hand gestures, and characters saying one thing but using body language or gestures to mean another.

To adapt that into spoken lines on a script undercuts just how brilliant and smart many of the protagonists and antagonists are. I think Lady Jessica got the worst treatment in the first movie.