Its almost certain that she didn't. They have the "I understand" from the mind controlled people. Im glad they didn't go there though. While I love seeing Jean with a temper and getting a little rowdy from time to time, any sort of villain turn would always turn me off. One of the big elements of her character that I like is the "pure, good one" thing that people rag on from time to time. Of course that doesn't mean I want a boring zombie or something, but I like her being a beacon of hope so to speak.
Im so mixed on where id like to see Jean. A solo sounds great due to the facetime she would get, but I also think she works best in a group environment. Branching off to something like avengers could be a change of pace and something interesting, but I can't shake the feeling that she would work best in the x-environment. Granted I know very little of avengers comics, but the x-books have always struck me as a little more personal. Be it friendships, mutant cause, all that sort of stuff.
It helps that she can really stand out in that environment. She can mix perfectly into all the x-stuff, while at the same time kind of being an outsider of sorts. If you look at something like DPS or Morrison, she is very much part of the x-men, but there is this exciting dangerous part off to the side where she is really alone. It makes her relatively special.
ANXM is practically built off this and the main reason the book succeeds (granted I have a Jean bias). The time travel/alternates is a big turn off for a lot of people, and the O5 itself has resulted in next to nothing. It looks at mostly Jean/Scott interacting in the x-environment, and then all those interesting/exciting/dangerous elements to the side, all focused on Jean. Whats up with her pink power? Why does Xorna implode? Is a Phoenix appearance lingering around? Will she interact with Adult Jean at some point? Is she sticking around full time? Is the mixture of emotional trauma and extreme power going to lead to a meltdown? All these sorts of questions have fueled the book. With that said, when a lot of this stuff is explored, where do you go after that? Perhaps a shakeup is a way to find new material, rather than relying on the old, reliable stuff.