Sorry if I mist something, but like you said there was alot XD.
On the ghoul front and automatic resources. Currently the game is moving to 2 combat systems. First castle defense which is aimed to make the player not lose resources. Second an offense where you go out and raid. The main point of the raiding (as of writing, this might change) is to collect thralls. Thralls are basically the ghouls you describe. They are used to collect resources like wood and stone by sending them to for example the mines.
On the slave girls front. I took a lot of inspiration from Dungeon Lord and could be adding some type of mind break/catatonic system for them. Currently they just do not gain stats after fucking them for some amount, which is not the best system - but it works for now.
And the skills are interesting, again can't say what I will add. I'm focused on combat at the moment so I'll loop back to this when I get around to 0.3.
On the oral thing, the obedience thresholds are very different at the moment. So a new girl would take a couple of nights to go from rape to consensual.
The idea of making affection the consent barrier and obedience be for jobs is quite a good one, because after the current changes affection basically became useless. And that is a nice way to get it back into the game.
Love training are neet as well. The AI could probably manage some of those like fingering and sex toys.