Some more comments on the stylistic choices and these two movies as a whole.
I was not thrilled with the choice of black and white for the Harkonnen world. I was even more disappointed by the planet of bald, bulbous heads. That’s even worse than the whole planet where everyone is a redhead.
Besides looking ugly and dumb, it makes no sense. Harkonnens are described as animals - for their behavior and morals, not their appearance. And Jessica being the Baron’s daughter is less sensible.
See, Herbert did this thing called foreshadowing. So Jessica is described as having bronze hair, and later the Baron is described as having red hair when younger. Then when subsequently her heritage is revealed, it fits.
Also, I didn’t get Paul’s line about they are Harkonnens, so that is how they will win.
Anyway, the challenge of adapting Dune has always been that Dune is very internal thoughts book. There are a lot of internal monologues, and a lot material happening in thoughts. That is difficult to adapt to some firm of dialogs that does not feel forced. The old TV trope, “As you know, Bob, …”
Lynch tried to do that with voice-overs, but it’s cumbersome.
Also, there is extensive exposition in the novel to explain things, especially as the story unfolds. That kind of info dump can be tedious in a movie.
The challenge for Villenueve was to take a source material that is long, complex, and dense with ideas and try to capture the essence while forcing it to fit the fine constraints of the medium.
So what ended up is that some of the plot elements are truncated, some subplots snipped. Add to it the choice to say less, and sometimes plot elements don’t make sense.
For instance, the scene where they first attack the crawler, and are running around getting shot up by guns on the 'thopters and trying to get a shot with their rocket launcher, and then as soon a the aircraft is downed, they open up on the crawler from several locations with lasers. Someone who doesn’t know the story is left to wonder why they didn’t just use the lasers on the 'thopters, not realizing the aircraft have shields and the outcome that would produce.
Another example is when Paul uses the voice on Reverend Mother Mohaim, and she then blurts out “abomination”, it isn’t clear what she means. In the book, that is specifically being used to describe Alia being pre-born (i.e. exposed to the water of life in eutero). So there doesn’t seem to be a real reason for it to show up in this movie.
Similarly, the importance of the Family Nukes and why Gurney has them hidden away, and what it means to use the nukes is lost. Because the Great Convention isn’t mentioned, one is left to wonder why Paul doesn’t just nuke the Emperor and Harkonnens.
Also, I get that dragging the nukes out is a way to avoid digging into the details of the worm/ spice cycle and how water could be used to destroy spice production completely. Easier to use a means people have heard of than give extensive lessons on worm biology.
But the exclusion of the Navigators Guild in the finale is felt. One of the reasons Shaddam capitulated is that the Guild flexed their power when Paul declared he could and would destroy the spice. They absolutely require it and are addicted to it.
I think the movie does work with the story presented, but I’m not certain how much is because of what I know that fills in the gaps.
And I guess that’s why, as pleased as I am with this version, I still kinda like the Syfy version better. It spent more time on the details and nuances, which makes the storytelling better.