Westworld is one of my favorite shows as well. (Have you seen Person of Interest? Same director, similar themes later on around S3-4)
I think you're right, that westworld doesn't have a lot of superfluous details - but the degree of plot complexity required to make use of all the details it contains has led some critics to call it convoluted.
On the other hand, the Lord of the Rings trilogy - the movies are full to bursting with strange details that never make any difference to the story. Bilbo's birthday party is one immediate example - there's a bare minimum needed to establish some characters, and then on top of that are details just there for the sake of themselves.
Westworld is one of my favorite shows because I think it accomplishes this very well (S01 and S02, not S03). There are a myriad of details, you get the feeling they'll be important but there's simply so much to keep track of that it's very difficult for it to become predictable and boring.