Magneto might have been mind controlled by Emma in the end but he did plan IvX with Emma and that was certainly with his consent. Psylocke views IvX has a dangerous war that could have easily ended with far more deaths. With the new lease on life that mutants have, Betsy views Erik too dangerous to live. Now, you might consider this unwarranted but that was part of the point. Currently, Besty and Erik are not so different after all. This short uncanny xmen run has been more about exploring the character of the team members than any major events.
The issue was also a team book wrap up were we can see where the team members currently are. Since Betsy is concerned for her teammates, even Mystique, it leads me to believe that Betsy will be the one to invite Mystique to join the Astonishing X-men. Betsy has experience dealing with murderous personas with Archangel, so maybe she can help reform Mystique. I'm quite happy what little character development Mystique has gotten is not going to be forgotten and it seems likely will be continued in Astonishing Xmen.
Also, it was just fun to see proof that yes, Psylocke can kill Magneto in a 1v1 fight. And Magneto was even surprised. lol Its interesting to see that Exodus is free. Poor Exodus, he has been reduced to a plot device now. When the story needs him, he'll briefly appear just to disappear just as quickly. lol