The amount of screen time Jean has was very pleasant surprise. Unlike most people I did not hate The Last Stand. But it was very frustrating. It seemed we would never see any of those actors, outside of Jackman play their parts again. Now with this and Days of Future Past we are seeing most of them back.
The big exception is Cyclops. I hope there is a surprise reveal at the end of the new movie of a cameo by James Marsden alive.