To do that they would need to explain what happened to make Rachel, who was the ultimate survivor, revert to someone with no such ridiculously weak psychic defense. She was a heavy hitter who took down Thor! She took out the Minotaur.
And now she cannot shake off the stupid twins or Mesmero. During Battle of the Atorm she psychically defeated Xavier's son. If she can do that, Nova should not have been able to control her.