I wouldnāt say that people have been explicitly complaining about the lack of a hardcore twist/reveal but I think itās implicit. I can certainly see how that if youāve invested decades into these characters and thought about them and lived with them then some of the choices will certainly be jarring and disappointing compared to expectations. I have definitely experienced that with some pop culture that I have lived with (being disappointed with strange new directions with bands, The Simpsons post Season 10).
I am in no way saying that fans canāt be disappointed with the film as it does make controversial decisions.
What I am saying (again, not directly to you, but to some of the commentary Iāve read online) is that not having a theory on Snokeās backstory (for example) but still enjoying the film is perfectly valid too, and doesnāt make people ālesserā fans of the franchise (and it certainly doesnāt destroy any childhoods).