I feel Floyd would not even need 4 fights to stop pac i really feel he could do that. I think you also meant marquez not morales?
Absolutely he'd get more credit. Marquez never decisively beat Pacman from the beginning to the end of a fight. He had a couple razor close decisions, and than he was able to KO pac in that 4th fight. But lets not make it out like JMM was destroying Pacman in that 4th fight. After JMM had the KD on him in the 3rd round, pacman turned it up and was actually doing VERY well for the 4th, 5th and MOST of the 6th rounds. He dropped Marquez once and it looked like he was actually on his way to stopping Marquez within the next few minutes. And as for Bradley, anybody who saw either fight knows he lost both of them soundly. So really, if FLoyd beats Pacman easily, it will be much better than what JMM did. He's officially 1-2-1 against manny with all the fights being very, very close. Even his only definitive win came at a pretty big expense since it looked like Pacman was about to knock him out.
What about the fact that marquez and bradley both beat a fresher and nearer to the beast version of pac in 2009? Bradley and Marquez beat Pac in 2012. Floyd will fight Pac this 2015, three years later.