Starting Aaron is the right thing to do. If we lost with him, big deal...Phil has lost plenty of games in his career. Yeah, our Pairwise would take a hit, but we're still going to make the playoffs, and like AZSioux said in the Bracketology thread, either way you have to beat 2 good teams to make the Frozen Four. So, in the long run, starting Aaron is the right thing to do. He's put in his time. Like dagies said, if JPL got hurt, to have a goalie that never made a start (or even play this season) would be scary to watch, plus Aaron would have to go in cold. If he knows he'll get a start, he can mentally prepare and do the things it takes to get ready to be the starting goalie.
If we were to win, and win convincingly, with Aaron as our starting goalie for a game, that will do wonders for the confidence of a team.