Originally Posted by X-Maniac
Even Jean's arc in X2 wasn't perfectly done, to be honest. We're told she hasn't been the same since Liberty Island (and no mainstream viewer would connect the dots between that and Magneto's radiation machine doing something. In fact no one really knows what happened to Jean at the Statue of Liberty. Did that machine evolve her? Break through mental blocks? Did Singer even envisage the mental blocks concept in his vision of what was happening to Jean?). Jean later has a far-too-brief fight with Cyclops and then is found twitching on the floor behind a generator, somehow having hurt her ankle while Cyclops is walking perfectly well from being flung through the air and across the entire generator room.
I definitely agree with you: I don't think Jean's arc was an amazing one, but it at least is touched on in each of the movies.