I was brought along to a preview screening of this by a fan of the books. Me personally, I’m not a fan of the books. I saw the first two films and found them mildly enjoyable, solid entertainment without much substance.
The story basically devolves into a typical sci-fi dystopia, with series protagonist Katniss relegated to the sidelines of a much bigger conflict. Therein, however, lies the fundamental problem of the film, as it remains committed to focus on its unlikeable, powerless main character instead of portraying the larger conflict.
All in all, not a whole lot happens in this film and I seriously doubt the necessity to split this story out over two films.