Most marked mousies don't meet any standard for show, no matter how remarkable or unusual, and if one thinks about it for a minute, it's easy to see why.
Show standards reduce the chaos and make it possible to discern the specific identity of that breed. I love wildly unusual marked mousies, but I don't for one minute think there should be a category for every kind. I was kicking for awhile about tricolor and splashed standards, but I've come to understand why there aren't any other categories than there are right now. That doesn't mean I'm going to knuckle under and start producing (or trying to!) only meeces that to fit that standard, it just means that I sympathize with the plight of the organization and the judges.
The other hurdle is getting other breeders interested in trying to keep and breed for the new standard of that variety, as a variety that is not widely bred will not raise the interest and create competition. Still, I do respect you for being willing to try something new.
BTW, there was a standard in some countries (may have been provisional, I don't know) for something close to what you're talking about, called Irish, which was to have a face blaze, a belly blaze, beyond that I don't remember. I think an Irish with a few more white areas, like the feet and tail, which are pretty common on meeces with blazes to start out with, would be very
attractive. I have a number of them in my tri litters, more or less marked that way. Aye, more or less, there's the sticking point. Socks are just too cute for words. and I'm a softie for face blazes.
Good luck! Be sure to keep us in the know about your progress.