Clever is good to get a good job in your life. But it won't never replace experience. And in this complex field precisely. You don't get a pro from the get go at doing things with multi-layered contradictory needs, because your clever and you get a plan. I don't want the MC's gf acts like a reskined nerd. It needs something more to create realistic characters.
One exception is if the clever character has to pay his mistakes, which is realistic. But not the elder super clever characters doing perfect and not discovering complexity of relationships.
I apologize beforehand if I misrepresent your position, but, from your posts here and other threads, it seems like you want this story heavily focused on MCs emotional turmoil, doubts and insecurities at every step of sharing his gf. How it is a monumental shift in their relationship, how both of them have contradictory needs (both within themselves and compared to each other), how it presents new potential obstacles and pitfalls, etc. Sometimes I get the vibe that you want Anon to feel like a cuckold without necessarily calling him that way. And that every deviation from this "essence of pure NTS" formula, be it adding other partners for Anon or more lighthearted tone, free from negative consequences of opening up a relationship, lessens the experience for you (which is a perfectly valid feeling).
And I would ask: don't you think you're expecting a bit too much from a porn game, albeit a really-really good one? At the end of the day I think most of us (can I get a show of hands? non-dominant ones, please, if you're busy) came here to fap to Suzie getting fucked by Anon and others. It doesn't have to be so realistic and full of conflicting emotions, that would be common irl. It just has to avoid things like bad dialogue and wooden characters (my example would be
games by MiZtyl and Captain Kitty), what you call "trivial swinging activities" (Suzie fucking random strangers, like a pizza delivery boy, taxi driver, gym instructor, etc. every other day, like in
The Adventurous Couple). If we take it seriously, then the very first sharing scene of Anon asking Suzie to show her tits to 4 mover guys would end up on r/AmIOverreacting and reddit would - justifiably - tell Suzie to dump him.
I am on the opposite side of the fence in that I don't feel like there needs to be more "tension" in the sharing part (we already have the whole plot with Merryn trying to seduce Anon) and that letting Anon have fun with Cee somehow "dilutes" the sharing Suzie experience. Even if Suzie gets full freedom to act from Anon, there are opportunities for BananaCreamGames to get Anon and us excited because we still won't know what she does in each case and, more importantly, how she does it. Judging by the Drago massage scene, that woman enjoys embracing the role and doing a full-on performance for Anon. Which a lot of sharing games are lacking.