Sorry for the late reply, just now listening to the show:
As the biggest Cyclops and Emma Frost fan on CAG and in the history of the VS. System trading card game, I was disappointed, but not surprised at the horrible performance January Jones gave from Emma Frost. Any Mad Men fan knows she's the worst part of that show and she was also the worst part of this movie and was only cast as Emma as she had the body and hair color.
Emma is suppossed to be cold, but also coniving, seductive, and out for herself, at least at that point of her character's development. Every opportunity January was given to show these traits she just came off as a wet fish. I sent an angry tweet at her Twitter account and was made fun of by my friends. FYI she's hasn't updated her official Twitter since Mad Men season 4 came out on DVD/BR.
Wombat, Pixie has become the new "this is the young character to showcase the trials and tribulations of growing up a mutant" in the last few years. Also Pixie in the comics is caucasian. She's basically Jubilee/Shadowcat 2.0 as those 2 characters have their own problems now
(Jubilee is a vampire and Shadowcat saved the earth by phasing a planet killer bullet she was stuck inside through the earth but couldn't phase back to solid form essentially "killing" her only for Magneto to find the bullet going through space and bring her back to Earth but only as a living ghost.)