One thing I think they could have done a bit more with in this movie is flesh out a few of the other X-Men characters a bit more. They did a great job with Xavier, Magneto, Mystique, Beast, but the others didn't get much in the way of background and so on. I know it's a big cast, but it would have been interesting to learn more about a few of them. Maybe in another film. It would be great for a young Cyclops to show up and join them and be with his brother (Havok) again. Be cool to see a young Storm too.