Overall I like this a lot so far. This sort of setting is halfway believable since it diverged from ours 500 or more years ago. Genre boundaries suck, but I do wish that this had at even as much punk as Fullmetal Alchemist rather than just steam- and deisel-.
The titular protagonist is interesting and has a clean design, but she's barely developed compared to other people and the machines themselves. I'm very happy with the first 1.5 volumes, but I'm going to get bored soon if Łucja is just a mascot with just MMA Knight and Sweetie modes. It'll be a damn shame if this stays on course for painting noble scions who will magically make things better by recovering their birthright, like a bland and mollifying fairy tale.