i think its a lot like the Am's when they 1st came here they where only concerned with the egg color not what they looked like...
Seems like with some breeds that aren't so common, people will focus on one thing like egg color, feather color, body type, ear lobes, combs etc. rather than on the whole bird. All are equally important, if not then what's left is a different bird. IMO it requires sufficient numbers and hard culling.