Pacioretty went straight to the AHL from his draft year and returned there despite a few call-ups with Montreal. We're talking about one of the best goal-scorers in the NHL during his years passed in Montreal. It wouldn't hurt a strong NCAA player to play at a slightly higher level in the AHL before moving up to the NHL.
Every player has a different path to the NHL, if they are ever to make it there. trying to make a cookie cutter approach to development will ruin some potential careers, IMO.
Still, I don't think there will be anything wrong with seeing Hage start in Montreal after two years in the NCAA, let's say, only to be sent to the AHL after 20 games or so in order to work on anything that might need polishing from what we'd seen of him in those 20 games at the NHL level.