Oh, boy, this is going to be a monster - I have put together a list of things that I would install as AFL chief that would make the game a more even, balanced, and enjoyable spectacle and I haven't changed one on field rule - who knew you could make change off field that affects the onfield...
Instead of making it all TL:DR (Too Long; Didn't Read for Old Dee) I have cut them up into some sub headings so it will be easier for people to quote and massage and ridicule and explore what they wish: