And I honestly think that everybody should better use .pdf walkthroughs instead of mods.
I couldn't disagree more.
It makes a big difference if you want to spoil the story or if you want the story to develop in the direction you want.
Personally, I also play with the mod because the game is way too non-linear (and that's definitely not a bad thing) and I'd like my relationships with certain people to go in a certain direction. Sometimes you can predict the consequences of your actions, but sometimes it's a wild bet. How do I know if being an asshole will lower the person's trust or if it will make them more submissive? Such things are simply impossible to predict.
The only gameplay where you can 99.99% easily predict the consequences of your decisions is a boring and faithful vanilla boyfriend who is nice to everyone and wants everyone to like him. But I'm pretty sure that this is not the route that the vast majority of players will choose.
Personally, I think it would be good to differentiate some dialog options by color.
Practically the empathy perk from Fallout
Red would be showing your dominance over the person.
Blue would be an effort to increase trust in your person.
Pink would be trying to make the person more slutty. (Sorry, no pink color on this forum)
I think most people wouldn't need any mods then.
It's not about knowing exactly what your decisions will cause, but what you're trying to achieve with them.