I have to say JMM did not make Pac vs. Floyd less interesting. The general public will watch the fight because Pac has been built up to be a boxer who has a legit chance to compete with Floyd. While, people who watch boxing on a regurlar basis and analysis the fight in an unbiased manner already knew that this was a one-sided fight in favor of Floyd. So, I don't see how it could be less interesting when one side will buy into the hype while the other side knew it was one sided to begin with.
Later on down the line no one will remember that like SRL and his cherry picks later on his career, and besides Floyd is older than Manny so that argument holds little weight, yeah Marquez took the steam out of the fight but once the Floyd vs Manny fight is signed the buzz will be back and long gone *******s will reemerge full force.