His problem isn't punch power, it's punch delivery. He is arrogant and it manifested itself in laziness. He got fat and he didn't iron out technical difficulties. When he fought up the middle he did well. But he's stupid. If he knuckles down and works on his his craft he will have a better delivery systems and because his power then gets there people will think it arrived when it was always there. It doesn't matter if you hit like Gerald McClellan if you don't deliver the punches