Interesting, having read Dune and seen the movies, I tend to discount much of a connection. I would characterize 'Star Wars' as, very thinly, quasi-religious, whereas Dune outrightly interrogates religious questions and actions. That's why Herbert was bored by 'Star Wars'.

Back in the day, Lucas received a lot of criticism for apparently 'ripping off' not Dune, but 'The Hidden Fortress' a Japanese film by Akira Kurosawa starring the great Toshiro Mifune. And it is a great movie. Set in feudal Japan, the movie features a samurai general who has to get a princess across enemy lines, including facing off against a former student... It also has 'comic relief' in the form of two peasants, one tall and thin and supercilious and the other short and squat and resourceful, who always find themselves, reluctantly, in the middle of the action. Much later, after both Kurosawa and Mifune had passed, Lucas admitted to the film as having 'influenced' him.

I think Denis Villeneuve, who is really one of our more inventive and cerebral directors today (a worthy aspirant to Kurosawa comparisons), wants the cinematic 'experience' of 'Star Wars'--the gee whiz, neato of the new and the nuanced--but not the story, per se... but that's just me.