Well they do say a vid is like a visual argument and making this one certainly helped me to clarify my issues with the movie. I remember the first time watching just thinking that it should have ended with Anderton and Agatha's capture but it's really more complicated than whether the happy ending is deserved or not. It wants to be a big Dickensian novel of a movie with its subplots and genre juggling and meta commentary on what film makers do and each part of that, like you say, is good in and of itself but collectively they completely overwhelm its short story origins.