cjleeh: If that is the case. I tend to buy the bundle anyway, and find the cbz/cbr version else where. PDF is not that bad, but I prefer to have it cbz like you. I have tried converting pdf to a zip format, but it always messes up.
I wrote to ask them about it and they said it's up to the publisher. Dynamite usually does provide CBZ, so strange that they didn't this time. Perhaps if people pressure them like in the Groupees bundle, it will be added.
The main problem these days with digital comics, IMO, is that there isn't an agreed upon convention regarding file formats and image resolution. This opens the door to each publisher and digital store to use whatever they choose instead of having a unified standard.