One thing I didn't quite understand was what went on with Seven at the end. I mean she was already no longer a member of the Collective and I'd have expected her to have a similar (if much stronger) reaction to Picard's. But the way I understood it she sort of regressed to the time before her assimilation, and didn't all her implants fall out/disappear as well? To me that doesn't quite make much sense because she needed the implants for survival, and why should they just disintegrate?
The answer is: Make sure to pick up Full Circle
when it comes out.