Look I know clearly this game is designed around NTR & NTS, but one thing that bother me is, why not being able to give the potion to Mia, from a logical perspective it should absolutely been an option, she is the power hitter of the group, so if the others fall under the effect of the dungeon she could keep her head screwed right, sure it would mean she wouldn't sleep with anyone in the dungeon while the MC might have gotten some, it would have toned down the NTR & NTS, but the fact their is no reason given not to do that is logically annoying. The Dev might want to at least work in some explanation to justify not giving her the potion, something like it would have interfered with her witch powers, something else than the smart leader of the group not thinking to give said potion to his overpowered girlfriend.
Obviously come next, why not give it to anyone else? Considering the nature of the dungeon's power Leia which is already a nympho elf or Tara which is a horny kitten could have used instead of your character, or at last Gordok. Could have said it only work on males and if you don't take it, have him take it instead, it would have been funny for a horny bastard like him to be sidelined, it would still have plenty of NTS involved and not have to be bothered with the fact its either you or none that take the damn useful potion.