I really like Berto, but I've noticed that because of how he fights there are breaks that opponents can take advantage of. He isn't a smooth, seemless fighter, like Floyd or RJJ. He fights a little choppy sort of like Mosley. Guys like WInky and Forrest timed Mosley because he was robotic, and Berto is as well to a degree. Don't get me wrong when he punches, Berto is a beauty to behold, but his movement is really choppy, and he needs to counter more. He has Roy Jones Jr type speed, but he needs to use it more, When an opponent is coming forward Berto needs to make them pay by counterpunching, but instead he gets cute and tries to fight overly defensively, He is not Floyd Mayweather, he won't be able to get away with it against guys like Margarito, Cotto, etc.

This is why he needs Floyd Snr in his corner, because he can learn to counter punch and still be very hard to hit like Guzman is. Not only that but Floyd Snr also teaches fighters how to roll with punches effectively, he really emphasizes balance and staying overtop of your feet.