Oh man, I don't really know where to start!
I think this was quite possibly the best and worst novel of the series. The best in that Mr. Savile felt the most familiar with the Old World in this novel. I think he captured it perfectly, from the vicious "civil war" battlefields between Stirland and Averland to the slums of Nuln and our favourite fallen Witch Hunter, the world just felt like it had the 'right' amount of grittyness that made the Old World a fan favourite for so long. The portions of the novel focusing on the "civil war" in the Empire were great fun. I definitely felt most attached to cast of characters in that story line, and it was a great way to showcase the folly of the man. Unfortunately, our human cast of characters felt rather bland as a whole, despite having a really damn good lead character and some downright riveting to read chunks of story. They had the smart career soldier with the really shitty commanders constantly fucking things up and making life difficult for the rank and file. I really enjoyed it, but it felt like the armies lacked some of the character that could have made them perfect.
The Vampires were pretty stellar in this novel, despite some inconsistencies with similar situations in the earlier novels(such as how much they bleed). Mannfred was really fun to read, however I really wish Mr. Savile had taken more to really SHOW us why Mannfred was the best(outside of the fact that he actually knew that patience was a word). I kept feeling like I was told he was the strongest and the best Vampire Count, and he definitely did pretty decent for himself, but I didn't feel that he was necessarily any stronger or smarter than Vlad. He gave the humans a better fight, but that was more a consequence of not having his ring stolen off his finger and throwing his life away than any kind of tactical acumen or undead wisdom. I just felt like we got TOLD too much about our Vampire Counts, and not really SHOWN enough. Maybe it was because of the constraints on the story, or the author's personal choice, but it just felt like we didn't get enough focus on the Vampires compared to our mortal warriors.
On the undead side of things, I think Jon Skellan really stole the show though. His character and personality really grew from his humble beginnings in the first novel and even though they definitely grew in some dark and cruel ways, he really grew on me. Seeing his and Jerek's rivalry blossom was a sad affair, and I was definitely most sad to see him go.
Overall, I really enjoyed the novel, the tone was pretty damn spot on, and the world the novel took place in was definitely a great one. However, there were some definite flaws that detracted from the story, and some pretty decent chunks of the story felt wasted(either not being shown enough, or showing way too much), and other parts felt totally ham-fisted in for no greater reason that he had to get dudes from point A to B. I think it might have been the author having some trouble with the constraints that inevitably come from working in someone else's world, but it was still a damn fun read.