It's occurring to me that Dune was a big award winning "classic" right away, winning all those awards in 1965, whereas Lord Of The Rings didn't really take off right away did it? In 1954-55?
Children Of Dune, the third book, is better than Dune pound for pound, it's also a managable 470 pages instead of 800.
The last two Dune books were completely dreadful and forgettable and then Herbert croaked. I bet he rushed them out.
I have no idea whether or not the new Dune will be good, but it seems like Villeneuve took more time to make it at least than he did BR2049. The trailer made the movie look like it needed a better color palette.