No suspense
I've heard a lot of people attempt to explain away the lack of payoff as far as the "thriller" part of this movie is concerned. The audience is set up for some giant reveal and then it's played off like it's nothing to be concerned about. This is something David Lynch or the Coen Bros would do. Nowhere before this movie in Kubrick's work does he do anything like that. Kubrick told complete stories. This story is not complete.
My question is, do you think Kubrick just decided to be a smart ass in his old age, or are there some major pieces missing from the version of the movie we've been allowed to see?