I sort of agree - I think there are a lot of variations if you multiply, but when your character behaves consistently choices often boil down to:
1) Good
2) Pragmatic evil
3) Psychopathic evil
And of these I think you can only really act on 2) from late in Act 2. Allying with the goblins does only make sense for psychopathic evil IMO.
I am on my second playthrough and I notice that I am doing a lot of things the same way, as I usually play good. Origins seem to impact too little to be worth a replay on their own.
In contrasts, I think games like WotR allowed more gameplay and story variations within alignment - Azata and Angel are both good, but play quite differently. Especially since story choices impact more on gameplay here - while BG 3 has decided to have zero consequences if you go all-you-can-eat on tadpoles.
