I like that they are focusing on the dark turn for Jean and Xavier being at least partially responsible. We saw some of that in The Last Stand, but it was mixed up with too much other crap and it was not done well.
I’m a little concerned about them repeating a lot of the story from X3. Hopefully this is done much better and with less cheese. X3 had a lot of awkward moments and the movie felt odd because the special fx were done so poorly in multiple spots.