While it is definitely fair to say the Duke FR aren't really FR any more, they also still trail in overall experience by quite alot.
in the Kansas game Graham had over 3,000 min coming into this season, Mykhaliuk over 1,700, Vick around 1,000 and Newman over 1,000 before sitting out a year after transferring from Miss St.
That is experience that simply can't be made up in one year as they all played min similar to the Duke or KY FR, but had already banked quite a bit of time.
Villanova had 5 players with 1,500 to over 2,000 min of experience coming into this season, Loyola had 5 guys with significant experience coming into this season. Michigan 3 captains had 2 guys with almost 3,000 min coming into the season and a third with 1,500.
I think it is a balancing act. You have to have some talent, but if you lack some experience of how to handle the ups and downs and the stress of the season and Tourney it is likely detrimental.
Of the 20 starters in the Final Four, only 3 are FR and none are the primary player(s) on their team.