Other reviews already mention the unnecesary subplots.
For me if they just stuck more to the world that a demon possession could offer would have been much much better.
Instead of the unnecesary art gallery guy that ends up out of the story, have her having conversations with her demon.
Instead of a serial killer subplot, have her discover or visit the cult that adores the demon that possessed her and show how they would treat her as a chosen one or messiah or something.
There were many many interesting situations to explore but goes with subplots that don't have anything to do with the act of being possesed.
Those just made feel the movie too long. A shame since the idea was awesome.
Instead of the unnecesary art gallery guy that ends up out of the story, have her having conversations with her demon.
Instead of a serial killer subplot, have her discover or visit the cult that adores the demon that possessed her and show how they would treat her as a chosen one or messiah or something.
There were many many interesting situations to explore but goes with subplots that don't have anything to do with the act of being possesed.
Those just made feel the movie too long. A shame since the idea was awesome.