It respects the source material too much. It serves the only function of being an acceptable, technically excellent version for two audiences: the purists, who care more about the book than about film as an art form; and the people who are interested in Dune because they heard about it but they will not sit down and read it.

It has nothing to say cinematographically, and it has nothing to add to the messages that were written into Dune 50 years ago.

It's very competent, nothing else.