Also, in the books (which I should admit I’ve not read), what exactly were the BG expecting would happen after creating their Quisatz Hadderach? I can’t conceive of how they would hope to retain control or, perhaps rather, how their usual manipulation strategies wouldn’t have blown up in their faces. Would the person they were looking for be so vulnerable in that way? Would they not still have the capacity to retaliate?
The KH was always supposed to be male. He would have access to paternal memories the way that Reverend Mothers have access to maternal memories.
As an aside Hebert was operating under a theory in vogue in the 1960s that memory was coded in DNA. Women lack a Y chromosome so they had no access to male memories. The KH would have an X and a Y so he could see everything (ignore that Alia seems to have a copy of Baron Harkonnen, just a plot device that fucks everything up).
Jessica’s daughter was to be bred with Feyd Rautha to produce the KH. So he arrived a generation early, and outside of the careful education/indoctrination program they had planned.
Edited: all my KHs became KWs…because KW is a thing that deserves autocorrect?