How did you work out that Mayweather is just very good now? No doubt his best performances, or more offense and attack minded performances were at 130/135lbs. But to say he is not great is very naive. Also, I think your confusing the word evolved with improved. Pacquiao has improved over the last few years under Roach, from a good boxer, into a great boxer. They have both evolved there styles, Mayweather has evolved a more defensive style, were Pacquiao has evolved and introduced new things into his arsenal.