Exactly my reaction! And it doesn't improve. I read it at the end of 2014, and my thoughts at the time.
"[It] contains two pages of encomia and a back-cover quote from Adrian Tchaikovsky, and while I can understand praise for its being fast-paced, in the sense that there is a great deal of running around swiping at various bad guys, I can only think whoever wrote of "characterisation... second to none" read a different book to me. Some clever ideas, but overall it felt to me something akin to an RPG where rushing around killing things is more important than actual coherent/cohesive plot, credible dialogue or any kind of character arc."