Yeah, i noticed the trend with scifi books where authors attempt to solve the lack of socialism in the future of their universes. Usually they are smart enough to arrive at the conclusion that capitalism/feudalism will lead to extinction of humanity, but HUMANITY FUCK YEAH trope is also ruling out the transhumanism or transcendence for all, hence they often arrive at the ignorant masses ruled by godly human.
Definitely not at first, but remember that Herbert didn't planned next books at all, he just wrote with the flow, hence some characters take weird twists between the books. Especially Duncan as Hayt was serious as fuck, but something snapped after his hilarious death scene and when we see him next in the God Emperor he's already quite funny.
Outside of obscure Polish and Russian sci-fi, not really, Star Trek is closest i ever seen in English. There's also Fire on the Mountain but imo it's incredibly boring and supposedly Red Mars trilogy but i didn't read it yet.