I've never really liked this retcon regarding Warren's split personality problems. He'd been shown as having some sort of subliminal Apocalypse personality during Inferno. And, the wings actually saved him from crashing into what I believe was a news helicopter in X-Factor. The wings also fought on their own when Warren was unconscious.
And finally, it was revealed that Warren did have the split personality in the Kyle/Yost run on X-Force.
I know that the idea of Warren having a split personality was only brought back later on, but I honestly think that this scene makes Jean look kind of bad in retrospect. Warren was clearly dealing with problems, and Jean just looks like she is just dismissing them out of hand.