I've noticed some of the same kind of story development throughout most of his books.
It's not a huge deal, and I'm not saying he's a horrible author... but when you come from a fantasy book background, where the development is much more in depth... it can kind of irritating noticing the smallest things. (Also, not Warhammer fantasy... more like Dragonlance and Magic the Gathering... some others also.) I do like some of his work. I really enjoyed the Emperor's Gift. I think that might have been his best book. In my opinion that is. The Night Lords novels, on the other hand, were a travesty. Again, I think if he had a different editor, it would have been a bit better... I implore you to re-read the novels, and tell me how many grammatical errors you see. I know it's kind of a strange thing to hear from a German guy with little knowledge in the English language, but when I spend money on a book and read it... I expect it to make sense... well as much as possible. That's not really the only reason... again, I don't mean to sling mud, but just some opinionated thoughts on the story itself I would have changed.
Please forgive me, I am using a translator for a lot of what I am writing, so if something doesn't make sense please let me know so I can fix it.