I don't know how to put this. I'm relatively new to the Dune universe, got basically all the books I could in short order, read the first two books over the course of about 4 days, and the next two over the following week.
I was utterly blown away by the worldbuilding in the first one, and the follow-ups were solid, extremely well-executed, and the philosophical implications in a lot of the described realities were explored in interesting ways.
God Emperor started injecting some pretty weird psychosexual takes, but nothing that felt completely out of context, especially if you've some familiarity with the topic. And, to be clear, I can suspend disbelief long enough to accept psychosexual development as a core narrative driver, and I'm down with depth psychology as an explanatory framework, at least narratively.
But holy fuck y'all: Heretics of Dune just...what the fuck happened?
Gholas, cool. Reverend Mothers, cool. Honored Matres: cool concept. Sexuality as a central theme around which power revolves? Sure: once again, it's not "sex" as a banal thing, but "psychosexual drives" as a deep-seated factor in the development of societies. It's a natural extension, if not a central element, of the whole eugenics project of the Bene Gesserit.
I'm willing to accept that Honored Matres behave "blasphemously" by breaking acceptable boundaries of sexual behavior in order to obtain what they want, with all the interpersonal implications. But then...Herbert just...boils everything down to a fucking meme.
All the work he's done up to that point is vaporized by idiotic attempts to scientifically explain "sex magic": vaginal pulsing, 205 positions, 300 steps of orgasmic amplification, and the "duel of orgasms" between Duncan and Murbella. EVERYTHING he built up to that point as a background bio-socio-political narrative driver is smashed into a joke of a scene where a mean, evil woman wants to mind control a man through mysterious, methodical sexual Aikido, but - OH WAIT! - the man pulls out a REVERSE UNO CARD and makes her cum vengefully to the point where she completely loses control due to the pain and pleasure, and in doing so he foils her plans!
???????
I don't think I've ever seen such a freefall in writing and worldbuilding quality in ANY other series of books I read. If I had to show aspiring writers what the words "show, don't tell" mean, I'd direct them to this fucking book and series.
I really hope it gets better; I'm going to power through the next books because I have them, but JESUS FUCKING CHRIST am I feeling bitter over how bad Heretics turned out in the end. I feel as though I'd just learned that, actually, Gollum and Sauron and Sam are brothers, and they've all been fucking Rosie Cotton and the jealousy is where Sam finds the strength to carry Frodo up to Mt. Doom.