No penalties, challenges or replays:
Football fans have grown tired of seeing yellow and red flags on the field. For fans, it grinds the game down to a halt and ultimately only means another viewing of the same three commercials they’ve already seen a million times in this game.
Penalties, challenges and booth replays matter a lot more in the regular season and playoffs because the outcome of the game is far more important. In the Pro Bowl, it only serves to have people change the channel, which is exactly what they’re doing.
You could eliminate the idea of the game turning ugly and potentially dangerous by only keeping egregious personal foul penalties for the officials. But for everything else, I’d trust the players to manage the game themselves and play within the rules for the most part.
Plus, how awesome would it be to see a defensive back finally fight for the football on a deep throw and not see a yellow flag instantly? Or imagine a coach being allowed to be creative and create completely different formations that would normally break the rules? It would be madness but entertaining madness.