That's an interesting idea! Perhaps, the term would be "atypical" or something like that? Also, what do you think this approach would achieve? Perhaps more accommodations, understanding, or compassion for quirks?
My first reaction to the idea is that it would result in a lot of people getting diagnoses and may dilute the value/strength that the diagnosis carries, so maybe people would take it less seriously. But, if implemented in an effective manner, it may turn out to increase awareness and compassion. However, I'm interested in your thoughts to develop a more concrete personal stance on it.