The important thing to remember here is that a race is genetically impoverished relative to the whole population. Some of them are arranged into special, interesting, rare combinations. This is particularly achieved by guided recombination of selected forms in breeding work. Thus what is referred to as micro-evolution represents natural or artificial reduction of the gene pool. You will not get Evolution that way.
Evolution means construction of new genes.
It means increase in the amount of genetic information, and not reduction of it. The evolutionary value of new races or selected forms should be demonstrable by natural selection. However, if allowed to mix with the general breeding population, new races will disappear. Thus there is no evidence for Evolution here. Mutations figure prominently in the Evolution story.