What planet are you from? The only thing the average person can think about on the way out of that movie is the manner of her death. To say the movie didn't center on it is to say that only because it occurred at the end. In many ways it was like Miller's "The Crucible" Starts out slow and builds to an unexpected climax of death. An ending you can't forget.
I was more taken aback by the way she was injured than her death. Her death is not the center of the story in the way that Keyser Soze is the center of The Usual Suspects. It centered on the relationship between the two main characters. That is what the movie is about.