I'm sorry, but your interpretations of the colour palette are entirely baseless. The colour palette in the trailer is not your stereotypical serious-film washed out look or sci-fi. It is a very specific white-gold-black high contrast look with strong chiaroscuro lighting. It is a very specific look that is evocative of the original Dune illustrations and first edition cover artwork. It is also evocative of the Godfather, with its golden sepia-like colour palette and strong chiaroscuro lighting, which is a strong influence on Denis' approach to Paul's arc. It is perfectly suited to the film and is extremely faithful to the source material.
If you don't like the visual style, that is fine. But is not generic and is not some simple paint by numbers adherence to trends. Greig Fraser is a phenomenal DP and his work on Zero Dark Thirty, Rogue One, and the Batman shows that his is a great visual stylist and not some hack who chases trends. The visual style of the film is extremely faithful to the classic, dark, monochromatic Dune artwork, which is the intent.