Re: Mutant power levels
It's not because she couldn't stop Jean. It's because the Shi-Ar were focused on stopping Kid Omega from nearing the scene because HE was an omega level mutant and therefore what they considered to be a possible host for the Phoenix. Storm was fighting them the whole time and they never made a single mention of her.
I don't have my comics handy, otherwise I'd quote it for you.
And, yes, I am a massive snob, and there was no need for you all to think it at once.