Though he is supremely intelligent and his martial arts rivals anyone in the sect, I can't think of many traits that he is superior to compared to people like Yang Xiao or White Browed Eagle. The other two seem just as capable intelligence and martial arts wise, but they seem to more calm cool and collected, as well as less emotional. It seems that Yang Xiao is on a higher level of martial arts training too. Why Xie Xun of all people?