Finished this a few days ago.
A very enjoyable read, with some parts being less interesting then others. The overall feel was a bit different then other Vanguard novels, but not in a bad way.
I agree that the Ganz-story line was resolved a bit rushed all at once, with the final conclusion not being what I had expected but still satisfactory.
The Defiant-parts and Nimbus parts felt......odd. Not adding to the storyline itself. I see WHY the parts set on Defiant where necessary, but they lacked a certain depth. The entire Nimbus-story in Vanguard itself felt more like a reason to explain this planet's excistance in the Trek universe then being a real part of the Vanguard Saga. That said, I did find that part of the novel very interesting, and feel it could have been a novel or two by itself.
Quinn..... yeah..... I was really rooting for this guy in the last few books, and I truly hope that there is a true purpose to his path at the moment, otherwise I'll be sorrowly disappointed after the last novel.
Other then that, the biggest feeling I got from this novel, which I think was the what both writers intended and they did very well, is that things are going sour big time, and I can't help but shake the feeling that at the end of the last novel, a lot of the big players in Operation Vanguard will not make it through to the end.