Last year the Southern Section sent 8 to Open, while Northern sent 6. To be honest, I think the criteria is garbage. A simple eye test will tell you who is an Open team and who is not.
Monte Vista last year was an Open team. Im very happy they were able to beat Centennial in D1. However their team was an Open team. Bosco last year had ZERO business being in D2. Chaminade and Bishop Montgomery also. Im not saying that because they won their Divisions, but just look at their teams, their players and compare them to their Northern counterparts. Its not even competitive balance.
The best teams in that current year need to play against the best teams. State titles will always be watered down because you have teams that should be playing at the top division get put in their respective size divisions and its demolition derby.