I like the wings in that they add nuance to the type descriptions. I think the wing theory applies more to some people and less to others. Some strongly identify with both wings, some with neither wing. I still haven't found a good explanation as to why the wings must be adjacent to the core type. Why can't a 5 have a 7 wing for example if type 7 fits better than both 4 and 6?
5w6 or 9w1 sp/so/sx, I think