How come other mutants seem to be changing their powers and appearances?

It's hard to tell, exactly. Mutation in the Marvel Universe often occurs during extreme physical or psychological stress. Combining the removal of everyone's powers by High Evolutionary with increased sunspot activity (radiation) has apparently created a bumper crop of odd power increases and mutant births all over the world.

That said, there are a few obvious cases of this "secondary mutation," as well as a few other characters who have shifted appearances: • Angel: Not a secondary mutation, apparently. His shift from metal wings to feather wings is apparently due to Apocalypse's mucking with his DNA and that eventually wearing off. He lost his blue skin pigment in Uncanny X-Men #411 after Black Tom Cassidy drained his life force.

€¢ Beast: Secondary mutation. Evolved into a lion-like form. Gained strength and speed.

€¢ Emma Frost: Secondary mutation. Gained an extremely tough diamond exoskeleton which can block physical damage and radiation. However, she can't use her telepathy in ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.