Star Trek: Deep Space Nine - Fearful Symmetry

I will try not to spend too much time on this book here since I'm rather pissed right now. When "Warpath", which was released in March 2006, ended it was quite clear in what direction the next book would go: the mirror universe and the whole story behind Iliana Ghemor. This book does at least the later, but leaves the first one open to the next books ... and that's my problem with "Fearful Symmetry" by Olivia Woods. The book doesn't really progress the story. It answers basically all questions you could have had about Illiah, but the actual timeline progression is veeery minimal. I guess I couldn't even spoil anything here even if I tried.