Power levels aren't always the answer in a fight. A skilled telepath could defeat a more powerful one, and I think it is similar with TK. I'd expect Exodus to be able to defeat Hope and the same would be for Hope against Jean (and it happened in Extermination's epilogue I think). Skills trumps strenght usually.
The fact that her powers are now described as Power Manipulation and not just mimicry makes her more dangerous and powerful imo. Legion's level maybe.