After rewatching X-men first class, I realized that it'd be way better if we left more room for improving our control on our powers. I mean, sure, it's been a year, but how much of that year was focused, organized training on honing our powers? And that, too, without any training equipment. Just a thought I had, as I fear some characters may miss out on the epic training montage of posts that I consider vital to such a plot.
EDIT: And to add to that, I also mean that various tasks should be harder to do. Remember when I mentioned that your power shouldn't really be your ticket to accomplish anything? Like someone with super speed being able to climb walls, "control" time, create fire with friction+speed, create tornados, and etc? Someone with super speed should just... be fast. In other words, less side effects. More side effects come with better training.