On further reflection, I think the nagging aspect of this loss is that a less talented team beat a more talented team.
After all, Stanford does not have any players as talented as Stewie or KML, and based on overall performance last season I don't think most people would say that either of their guards are as talented as Moriah. But they have a talent level just below that which goes 9 or 10 deep on their bench. (UConn's bench may be as talented, but they are not as mature or experienced and can't be expected to contribute meaningfully in a game such as this.)
Based on talent, UConn should have won by about 15. UConn was ahead by 10 with 6:30 or so left to play, which is consistent with that 15-point margin.
Usually when a less talented team beats a more talented team, it is attributable to the quality of coaching. No one can reasonably say that Tara is a better coach than Geno overall, but on that night she was better. Getting a whole team to learn a new offense and run it effectively against the #1 team in the country is no small feat. Geno's job was smaller -- replacing 2 graduated players with two other players who had been their understudies for at least a year (referring to Kiah and Saniya). But the evidence was that he didn't do his job as well as Tara did hers. It happens.
Do you remember when Buffalo beat the Patriots 33-0 (or close to that) in the season opener, and then lost to the Patriots by about the same score later in the season? It is entirely possible that something like that will happen again.
I remember St. Johns beating UConn during the season, and losing by about 20 in the Big East tournament. I remember DePaul nearly beating UConn and then losing by about 25 in the tournament. On the other hand, I also remember Stanford losing to UConn by a big margin in a Thanksgiving tournament and then winning in the National Semifinals after Mel and Kalana got injured.
I think we can count on superior talent winning NEARLY all the time when Geno is the coach.