Mayweather vs Pacquiao is a bit like Lewis against Tyson. It would have been great a few years earlier when they were both still really good, but instead the are both past their best and the least past their best of them will win.
Also has anyone else noticed that these apparent "best pound for pound all time" fighters never knock anyone out anymore? I mean the last legitimate KO Mayweather had was against Hatten in 2007 and Pacquiao vs Cotto in 2009.
Lets look at PBFs last 5 results:
2014-09-13 Marcos Rene Maidana 35-4-0 W UD 12 12
2014-05-03 Marcos Rene Maidana 35-3-0 W MD 12 12
2013-09-14 Saul Alvarez 42-0-1 USA W MD 12 12
2013-05-04 Robert Guerrero 31-1-1 W UD 12 12
2012-05-05 Miguel Cotto 37-2-0 W UD 12 12
Against Cotto was good. The other 3 are quite average fighers and he won 2 by majority decision.
I think Mayweather is a very good figher who has been well protected. He will be quickly forgotten a la Calzaghe, who also finished unbeaten as champion.