The shakycam really annoyed me. It was a bother during the fight scenes, but in that setting I got that it was their way of not showing the blood and murder. I wasn't liking it, but I got it. There weren't exactly long descriptions of gore or something in the book either. But when there is shakycam in the intro? Was it supposed to insinuate that something about the place was off? The desaturation sort of did that job already. I just got a mild headache from it.
The movie is really close to the book(that game master character isn't in the book, though), but it's sort of lacking without Katniss' perspective(thoughts), which I can't think of a way to show well in a movie, and all of the slow parts, which are cut short. If Bob got tired of the forest in the movie, the book would have put him to sleep, probably.
They really glossed over the mad scientist parts of fiction, like the spaceships and the gene modifications. I preferred the dogs in the movie because they aren't as silly as the mutated wolves made to look like the murdered participants/murdered participants mutated into wolves, but I suppose the latter would be more fun.