Maybe it was (I read the book about 25 years ago), but the visualizations of things like the Guild Steersmen, and Baron Harkonnen were so distinct that it gave the film a very strong feeling of its own. I honestly can't remember if in the book Baron Harkonnen was quite as disgusting as in the film (and it worked well in the film). I could remember incorrectly but it reminds me a bit of differences between, as an example, the novel and the film of "The Shining." Then there was a TV remake of The Shining which was again quite different from Kubrick's movie (more similar to the novel). Of course, we've also had a TV remake of Dune which was quite different from Lynch's movie, though I'll be damned if I can remember that much of it actually.
Bookmarks