Having no longer access to more artwork from the same source would be a reason to change the art. I was just lamenting because it read like you did it for other reasons.
I look at lots of nsfw games and comments and the impression I got was, that AI is not really popular. It is tolerated, not something to brag about. Pixel art would be a counterexample. People highlight it and advertise with it.
And the timing was just too weird. I downloaded a version with AI art, while the screenshots were still the old ones. And after playing a bit, I checked back with the page and wondered why I never got to the part with the screenshots. When I reloaded the page, you had changed the screenshots and made this devlog.