Hey Dpthght, Just read through your story and it is uncanny how many things about what your wife is doing remind me of my H. Even the same age. Career changes, identity crisis, OP at work... Even the things she is saying like that you are a great guy but she is moving forward. Also that you feel she is conflicted but too stubborn to change her decision. So many similarities.
Hang in there, you might find your story has a few more twists and turns...
Things may not have worked out with the first OM at work, and now she is looking for other guys. That is what happened with my H. But when she finds out that the grass is not greener with those other guys either she may finally wake up from the fog and realize what she has done.
If you can keep up your positive attitude and changes you never know what might happen.