The continued problem with splitting novels in two is that...they're not really designed to be split. A story had a set beginning, middle, and end, and the end depends upon the foundation of the beginning. Even though we, as the movie-going public, were aware of the events in Part 1, we weren't experiencing them in the same cycle as Part 2. It's as though they had already happened and been logged away somewhere else. As a result, we weren't watching Katniss going through a dramatic change as a result of war...but just a single battle and a way-too-easy conclusion. She wasn't dealing with the death of her home district and then trying to assassinate the president, she was just angry from the first shot and stayed angry the whole time. While there's money in splitting these stories, it definitely doesn't do the movies any favors. In fact, the entire trilogy concept seems a little forced as well. The first Hunger Games was ingenious. The second was a darker but worthy sequel...but the third doesn't even seem like the same universe. It's an impossible story to tell: if the characters are trapped in an evil dystopia...the idea that they could win so easily undermines the villains' power in the previous movies. An unhappy ending might have been unsatisfying as well. As such, this movie feels more like fan-service...something people wanted, but when they opened it, it wasn't quite right.
So farewell Hunger Games! The first two were great, but you lost me on the last round. To be fair though, it doesn't really seem like you wanted to be there on this third story either. I suppose there are worse games to play.