For v.18 and beyond, I think it should focus on the existing harem members. And not just 4-5 render scenes, but full scenes exploring the powertrip of mind control. Simple things, such as making them dance, act like an animal or make them have sex with other members etc. Or even more hardcore stuff like making them temporarily regain their will and then traumatizing them by making crazy scenarios with the harem.
Mind control is a horrible thing (and I love it) so more negative emotions should also be added to the game. Having the MC act casually after killing the free will of his family and friends breaks the immersion for me.
Well you should find another game for that, or do your own, because the MC is not a sadist here. He wants his girls happy, not traumatized nor suffering.
Mind control is not equal to mental torture, those are two different fetishes. You can enjoy having control, and still dislike negative emotions alltogether. All I want is sexy girls in underwears
happily sucking my cock anytime I want, thank you very much. If they suffer from it, it would ruin the fantasy for me, and I'm sure for a lot of people as well.
As for making it optionnal, it would add some workload to the dev and wouldn't be worth the effort, especially if they're not into it themselves.