If Floyd Mayweather will continue his marathon boxing style, no one could beat him even Manny Pacquiao. It's clear Mayweather is afraid Manny's big punch he knows what will happen to him once he's hit.
That's the style of Floyd, he won't change, it should be Manny here who should focus to improve his spreed so he can catch Floyd.
Floyd is bigger and taller than Manny, so if he still got that speed he showed in their last fight, it would still be the same outcome, Floyd will man and the fight will end up a boring fight, and the rematch will be another disappointment.