By definition it's an absolute maximum of 8% of people will see each path per playthrough and I would expect the majority of players would be single class. So this is content about 1-2% of players will see. There's room for niche content to flesh out playthroughs but it really has to be super impactful to be worth considering. This rings of a feature that might be worth considering once the game has been in development for 30 years.
Can you bring any facts to prove your claims? Also if you'd read more closely you would see that this would be content for those who don't want to multiclass. By your logic Larian would need 30 years and a lot of consideration of impactfulness to add some side quests.
