Not saying you were but I didnt connect with it at all, and seeing that someone obviously loves it (a fan of the same author since we are on the forums lol) makes me consider that the fault was with me for rushing through it and being prejudiced against the genre.
I loved the book, but am generally not a big fan of steampunk. To me, everything works or not based on your connection (or lack thereof) with the characters. I read all of Codex, and while I enjoyed the action scenes and the magic (summoning?) system, I can't recall a single character a year or so after finishing, other than the villain (the bug queen). The Cinder Spires characters need some fleshing out, but they started out a lot more vivid to me than Codex, especially the etherialists.
It's hard to compete against a 15 book series, so I don't even try and compare against DF. The opening book of CS is light years better than the first couple of DF, but that's not saying anything a DF fan doesn't already know.
As to the setting, it seems to strongly hint at a steampunk genre in form only, with the eventual underpinning in harder SF. No way to tell right now what JB has in mind, but it seems to be a stagnant colony on a hostile world that's lost most of it's tech and history. The characters and story so far are more than good enough to keep me buying, but I'll be happier if it turns out that way. My dislike of the steampunk setting is due to it usually having no plausible basis of existence, even with strong fantasy elements, and is used as a lazy crutch by authors to do SF or fantasy with a Victorian theme. Steampunk as a technical regression from a higher-tech base is a lot easier to swallow, combined with the really intriguing physical setting.
Hopefully the characters grow on you, but even with the very best authors that's never a guarantee.