Fair enough to want to avoid it, although they do stress that it's optional and give good alternate prompts. (I think coal overthinks prompt order. Prompts come out in the order they come out.) But I can see why the sense of place of that canon would be important to someone, because the sense of place is so vital to that canon. I mean, the way the Changeover opens: Laura looks at a shampoo bottle and it's from Paraparaumu, where nothing romantic can happen. I remember reading the Changeover as a kid. It was the first time I ever read something magical set in a place that was recognisably NZ to me. That goes double for Christchurch - I can't think of anything else I've read set recognisably in Christchurch. Oracles and Miracles, I guess.

I'm not from Christchurch and I think it's (obviously) so understandable to want to avoid it as a prompt if you are, but I don't think it's a terrible prompt, either.