Firstly, you're side-stepping my comment. When it comes to sustained success of a program, Villanova is not in the same league as North Carolina, Kentucky and Kansas. Perhaps some day it could happen should they capture more NC's, and continue to do so after Wright departs.
Secondly, a National Championship is a National Championship and KO earned his. He had to contend with the adversity of a BS post season ban, overcome a number of transfers associated with the ban and/or JC's retirement, and then coach the team to victory night after night with a roster that wasn't exactly loaded with 5-star recruits. If coaching a talent-heavy team to a National Championship is as easy as you suggest, Kansas would have a lot more national championships.
Thirdly, you narrowly define "sustained success" as, specifically, winning national championships with more than one coach between 1980 an 2017. However, if the second coach wins a national championship within 3 years of the preceding coach that program is disqualified. This conveniently negates Duke, UConn and others from your definition but enables Villanova to gain entrance to this elite club with their 2016 NC (even though their previous championship occurred 30 years prior). Applying your definition, the UConn Womens' team has not achieved sustained success. Perhaps some day they will (provided Auriemma's successor doesn't win a national championship too soon after his departure). I guess I'm just not buying your definition of "sustained success".
Lastly, we can debate whether KO will lead the team to a future NC or FF. But, it shouldn't dilute or have any bearing on the remarkable success UConn has achieved over the last 30 years.