Defense always makes for "ugly" games, especially when most fans think only tons of offense is the height of a pure sport aesthetic. "Defense is what wins championships", as they say, but it doesn't make for great theater. I actually enjoyed the game more than most games, as I prefer the more defensive battle over against the fast-break, high-scoring style of someone like N. Carolina. Watching a style more in the middle of the spectrum, like Duke's (half court efficiency on defense and offense), is enjoyable too.
Uconn simply succeeded in what they do best, they make teams play "ugly". Calhoun's Uconn teams are annually known for scrappy, hard-nosed, efficient defense, especially in the front court. Uconn teams typically are known for their mix of length and athleticism, while most teams favor one over the other. Butler was simply outsized and out muscled in the paint. Yet they still held their own due to Uconn's poor shooting (perhaps that was due to Butler's unappreciated intense man to man defense, they play tenacious like bulldogs). As a former athlete with offers for high level play, I can say nothing is more deflating than to seem to be doing everything right (which I think Butler was doing) but the shots just do not fall. I think this was the only psychological possibility that would deflate a team like Butler. What also seems missed is that Uconn shut down Butler's best player and thus forced Butler to rely on the team, rather than having the ability to go to another star player, like Uconn was able to do (Uconn took off once Lamb heated up instead of Walker). In the end, better talent usually wins, even against solid teams.
in my opinion, the Big East once again proves its strength as a conference. And Brad Stevens is a great coach. He proves great coaches are about coaching, not about acting like a drill seargeant. I hope more coaches like him and Shaka Smart are given their chances, and that some of the old guard, who are high profile but can't win, step aside (looking at you UK).