So if the ntr/cheating is completely avoidable and it's not the main focus then I will likely still play the game, but from my perspective if it's completely avoidable and not the main focus then I wish it wouldn't be added at all to begin with since it's obvious the audience you're aiming for isn't going to like that content regardless and all you're doing at that point is wasting time making content that your main audience won't even touch and bringing in people that only like that content which is like oil and water, they don't mix and I'd prefer you just focus all you're time on content that your main audience will play instead of trying to please everyone. I was thinking of supporting the game since I love Persona and this looks like it will be A quality game, but I've never and will never support A game with ntr content whether that's lite ntr/cheating or full on ntr because I'd rather not support content that I don't like even if it's optional considering how many devs are essentially competing for support I'd rather support the ones that fully focus on the content that I know I like.
I want to make it clear that I think you should make the game however you want since I think games tend to turn out even worse when devs don't have an actual vision and change the content of their game based on who pays the most, which generally winds up losing my trust completely, it's just that fetishes aren't like game genres and more is certainly not always better, figuring out what kind of game you want and what audience you want as early as possible is the best thing you can do for yourself and the audience before they get invested into something they might not like changes to. I simply wanted to make my view on the subject clear since I know A lot of other people share the same views, but I honestly hope for the best with this project even if it doesn't wind up being for me since I can see the work you put into it.
Edit
I want to make clear that when I'm talking about ntr I'm specifically talking about netorare and netorase, I think netori is fine since the MC is still the one getting the action and not the one getting cucked.