The way I see it, there's going to be plenty of X vs Y angles. Some will be present almost constantly (e.g. "aggressive vs. diplomatic"), but rarely have a huge impact in one single instance aside from dictating your success/failure in respective endeavors, and presenting additional options in some cases. Other angles will be more obscure, appearing infrequently and potentially building up to a huge decision further down the line. And then there are individual decisions (without any polar counterpart) that just stick with the protagonist no matter what as an aspect of his character (e.g. the protagonist kills someone).
But this mindset I have will probably evolve in time, especially once we reach the conclusion of the first season (by the end of 2030 at the current pace) and the consequences of previous choices will have to be "recalibrated" to allow the story to continue smoothly without 50 parallel storylines. And there's always the fact that I can talk about my plans for the future now, but things might turn out completely differently when faced with how much time is actually needed to pull things off and whether it's even sensible with how the course of the story has gone. So, I suppose the bottom line is that everything is largely experimental and nothing is set in stone when it comes to 'mechanics'.
The problem mostly was that I never got any solid NTR ideas that did not divert the story - and changing the story to accommodate a single fetish is a no-go tbh. I am still going to implement girl on girl scenes, as in optional scenes between two girls (at least one of which is the MC's romantic interest) in which the protagonist won't always be involved in, which was frankly the only "NTR" I ever had firmly in mind.