- Hazmat suites can contain climate control, and the Tuareg wear dark clothing as well

- Wyrding Module: In Lynch's words: He didn't want Kung-Fu on sand dunes

- No idea what you mean, but charging into battle has since been proven to be viable tactic by the Avengers, so it has to work

- Ornithopter refers to the propulsion, like a bird, instead of a simple helicopter; I'd have to watch Lynch's Dune so to see how those actually look like in his film; Villeneuve nailed them pretty well

- Same reason why the first Enterprise under Archer used fancier screens than the ones under Kirk or Picard; IMHO Lynch borrowed a lot of his aesthetics from WW1, and the Dune universe is surprisingly low tech anyway

- The navigator: A wild guess, I always understood it as a way to show the importance of Spice and Arrakis to the Guild when they had to send one of their Navigators to talk directly to the Emperor instead of using proxies