the advantages will be that pacquiao will never be weak with this method, and he will be clean, and on top of that this way will detect cheaters, and cowards at the same time (if mayweather doesn't test pac inside the cutoff date he isn't a coward), also it can at the same time prove who are cowards and who are clean fighters, true intentions, and on top of that way the best boxer wins, his legacy improves tons of places in the all time list, etc etc, and if both are clean and both aren't weak, the best one gives a beating to his enemy in the fight, or well, at least maybe another more close boring result like a draw hahaha...