There is nothing wrong with her powerset but it is pretty much weaker version of Jean's powers. Unlike other Psychics, she does not have a distinct characteristic which separates her from Jean in terms of powers. Earlier, it was her time based powers,which has been retconned so it makes her seem as weaker and incompetent version of Jean. Giving her some differentiating factor, even a minor one like her unused time powers would do her good.