It would be a mistake. Their two best programs are leaving, so who knows what the league would even look like when we get there? We have absolutely no cultural connection to the league. I know the AAC stunk comparatively, but being in a league where your school doesn't fit culturally is a bigger problem than most people think. Even the good schools from the AAC like Cincinnati and Houston, there's no juice there.
The other big issue is that leaving the Big East is going to weaken our program. No more rivalries with any kind of history. It'll change the kinds of players we recruit, and not by choice, but because a lot of the players we go after want to play in the Big East and in MSG in March. I'm not naive enough to think we're going to stay in the Big East forever, but does the Big 12 make sense long-term?
Right now we're in a great fit. Ditching that for a bad fit when the whole college landscape is likely to change in 10-15 years anyway is foolish.