I also hate how Kynes is often condescending towards outsiders which greatly contrasts with book Kynes who is very deferential to avoid suspicion.
Kynes in the book is repeatedly warned by Gurney for not being respectful enough to the Duke. He is never quite condescending, but speaks with an air of authority and often in a cold and judgemental manner. This is exactly the same with Sharon Duncan-Brewster’s version of Kynes.
I suppose you mean Kynes’ pregnancy would be obvious to the Imperium but I don’t believe she’s regularly reporting to the Emperor in person. It’s clear she has spent much time among the fremen and likely spent her pregnancy with them as well. Of course, it’s not even confirmed yet that Kynes is Chani’s mother in the new movies. Even if that’s carried over from the novel and she is, this is a very minor nitpick.
I didn’t get the sense the performance was wooden at all. I think you’re making a much bigger deal out of something which really makes no difference to the character. And besides, diversity is indeed important, no matter what some people say.