The rules for call ups don't matter. There is no juice in it now for the same reason there was no juice in it when they phased it out in the early-mid 90s. Nobody views football as a state thing anymore aside from a few oldies. The kind of people that barrack for both Port and the Crows.
The more i think about it the more I agree with your line of thinking. It was good when it was still heavily a state based football system. But under a national competition where travelling, moving for work means a loss of state identity as well it really is meaningless to a lot of players.
If the AFL want to have a representative style all star game do East v West make it part of grand final week. That way all players are eligible except the two grand final teams and they play Friday night rotating around Australia each year.


