Finished the novel last night and IMO it's definitely weaker than the last novel. I haven't voted yet, since at the moment I'm not clear yet if I should give it an average or above average, the tendency is strongly going toward average, though.
My main problem is that I feel that the series status quo is a lot less interesting after the events of TET than it was after CotS. Almost everything of the good work done in the last few novels has been undone to pretty much return the series as near to TV series Status quo than possible.
Another thing is that I don't see yet is why it was necessary to bring back Janeway beyond her role in this novel, if all she does is pretty much swapping back places with Eden. I actually think the more interesting move (if you feel the need to return Janeway to the living) would have been to have both Eden and Janeway around.
Anyway, to make it short: A little disappoinment after the great CotS. But Kirsten Beyer undoubtedly is a talented author, and I will definitely check out her next Voyager novel if/when it comes out.