Keep the federal government out of an international port since they can't handle what they've already got to do. Laugh the sanctioning bodies out of existence. Keep the 105, 112, 118, 126, 135, 147, 160, 175, 195, and hw classes. Make it illegal for a promoter to have options on a fighter, or to have more than a one fight at a time agreement with any boxer. Weigh in the day of the fight. Do away with television for all but the biggest fights: when the fighters make their $ from the live gate they'll fight more often and against better foes because who will pay to see a set up record padding fight?
Fighting more will make boxers more skilled defensively so decisions will have to count again, and a loss or twoor ten shouldn't end a career.