mostly i was just happy to see more fellatio in this installment, i'm an absolute sucker for that stuff (haha).
to be honest i wasn't expecting all the variety of mechanics, it's not bad or a waste and i wouldn't want to discourage you from being creative... but i would've been just as happy with the standard corruption mechanics you established earlier lol.
but if you're dead set on playing with new ways for mezz to struggle for control of his mind, i would suggest a kind of "orgasm control" mechanic: all you have to do as the player is help mezz resist the urge to cum, because it's when he cums he loses more control XD. lots of opportunities to put in a little joi or other hypno stuff.
maybe something for next chapter /shrug
anyway, had fun, would come again lmao.