The problem being that they changed Hazel and Foxglove so much that they might as well have created two completely new and different characters, since that's what they already did. Not only did they look completely different, but pretty much every single personality trait that had defined either one was mathematically made exactly the opposite.
And the story was a mess. It read like an overly self-conscious attempt to ape Gaiman, rather than like Gaiman himself, and my initial impressions of how utterly unsatisfying its conclusion was were validated when I saw that the trade paperback was forced to add a few pages to explain exactly what the hell had happened, much less why any of it mattered.