The usual form is not seen in this film, There's no plot so the suspense become non-sense. I didn't know the name of the protagonist in all the movie. So, if the characters aren't developed you can't feel the suspense because you don't know characters' lives. Nolan also wants suspense scenes and that makes it look a little forced.

I punctuated it as 7, because the vissual effects are just awesome.

No development, no dialogue, no plot, and forced suspense.