Lynch’s visuals were key to being able to finish the book, for me. I took three good stabs at the book before seeing the movie, always gave up about 50 pp. after my previous stopping point. Once I saw the movie, I was able to visualize everything better, and the book became an instant favorite.
I don’t think Jodorowsky would have made a Dune which North America would have found acceptable, but I think the visuals would have been even more amazing than Lynch’s Rococo/grotesque excursion.