The downside wth using the Blazes as the template is this, who's actually going to use on their guitar? I have a feeling most people are going to go the RioGrande/BKP/Duncan Custom Shop route.
emphatically agree. not just because all those real single coils sound much better, but also because the Blaze is smaller not larger. if they do a Rio Grande-sized single coil route, you could still put a Blaze in there. but if they do a Blaze-sized route, then you can't use any other brand because they're too large to fit in that hole.