Your description of the movie sounds a great deal like the book (the first book, the singular Dune), with pretty much the issues the book itself had. It's subjective, of course, but all the Arrakis scenery *reads* as monochrome, somehow.
I'm guessing the prospective Parts Two Et Al would get into later books -- especially if it's showcasing Momoa as Duncan Idaho, and he's allowed to have fun.