I agree with all you said. Not only did 'they' let the cameras roll, they scripted the action.
Just last week, I had said to dh, "I wish we could bring Krissi out here for a while, to get her away from...:-x" Obviously just a wish that she could get away from all of that.
Instead of meeting her in her grief in order to render effective help, 'they' set her up. Trying to bar her from Nick was like asking for her to cling harder to him as her anchor, and that's exactly what she did, until...
A far better approach would have been to take both of them under a loving wing and give them support, even if/as their relationship broke apart.
~jmo~