Dune clip - Chalamet and Brolin shield fighting

[Eldan]

I agree with the comments of Wintermoot above about the difference between novels and movies as regards exposition. There's another important difference, I think, which is the ability to skim in a novel. If the author decides to wax lyrical about the specific properties of this particular sci-fi whatever, you can just cast your eyes over it and pick up the important stuff before getting on with the story (or skip it altogether and return to it as necessary). You can also quickly refer back to it if necessary, if you've missed something.

And to go even further, as in some books - including Dune - you can have appendices and a glossary.

As for bonkers flamboyant... they are space aristocrats who rule a rich planet. I think they could use a bit of ostentation.