I think it should be a little clearer whether or not it existed any civilisations besides Panem. And if it didn’t I think it would be unlikely, I know most of the world is flooded and everything, but I think there have to be smaller islands and stuff. But then again this isn’t important for the progression of the story.
Hmm… I would have liked to know what happened to the goat… Or maybe a little more about Annie and her kids future… Maybe the names of Katniss’ children. Most of this unimportant things that wouldn’t do much to the story.