"Competition integrity", what is that exactly? I mean you've got one state with an overwhelming majority of teams. All of those teams with a considerable history to sell. This concentrates the media and others to over value these teams and feed the power. The idea of the "big four" etc giving them an aura that helps financially and with things like player attraction etc.Depends on what you value - we trade competition integrity for growth of the game. I don’t think that the trade is worth it.
Also don’t accept the only way is through the clubs. Even if it was, those clubs could be given financial incentives instead of better access to talent, just for one alternative.
Your ideas might work, but the AFL wouldn’t get it right. They don’t even explain free agency calculations, the less in the shadows tampering the better.
On the flipside, if you don't grow the game, you're incredibly vulnerable to competing entertainments, like video games and/or international sports like NFL, NBA & soccer.