I'm a little late but I've just finished reading X-Men 4's Halloween Special. Wow, a nice showing for Jean Grey. I agree that the character work was quite superficial. it was strongly implied that Jean was indeed Dark Phoenix (there will never be a direct answer to this...but I take it). It was a lot of fun seeing her kicking ass so casually while everybody was sleeping.
I love it when Jean is protecting her fellow mutants on another plane of existence without them even realizing what she's doing and what is going on. It reminded me a lot of Jean psychically/psychometrically (?) cleaning the house from "psychic detritus" after Bastion's attack meditating upside down. I have to see more of those creative uses of telepathy as a "spritual healing device" after moments of trauma and violence. It would absolutely fit her personality and power set.
I really think authors should develop those moments and her powers further and showcase how Jean is a protector and healer on levels of existence that transgress the perception of other humans and mutants alike. She should be doing for the astral plane and dream dimension what Doctor Strange is doing for the magical realm.
Jean is Psy Supreme.
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