In this case, remember the wolf-vamp-zombie story? Well, I just discovered a tonally-nearly-identical concept that already exists, just substituting zombies for magi and throwing in some hunters, called Unique. I'd have to actually buy the book and read it to be sure, but from the TVTropes description of it, it's exactly the same sort of thing I was going for with my setting: slice-of-life for the most part, while going about dealing with the increasingly-broken Masquerade and rather a bit about the different factions.
Ah, well. I really shouldn't be surprised.