I would change the financial structure. The tv money would get placed in a pot and distributed more fairly and encourage grass roots football. Distribution would be based on need. This would mean that local amatuer clubs get what they need before the PL clubs get their cut.
This would mean there was less money to pay players so wages would naturally cap at a level the sport could sustain. The argument that the PL clubs could not compete in european competitions, as they could not attract the best talent, would be true for a while. But, if grass roots football is looked after properly, you have a bigger local talent pool to pick from.
This would improve football immeasurably.
Secondly I would mike referees, I can't see Adidas wanting to sponser a player who is f'ing at the referee and their customers can hear this. In addition if a player swears in the vacinity of a referee it is an instant red card.
Right, football is sorted, should I move on to a cure for corona virus?