Pacquiao just carelessly walked into that punch. He has clearly lost all interest in boxing. This win means nothing for Marquez. Pacman is mentally shot.
Certainly possible, and JMM throughout his career has proven himself to be a proficient mid fight adjuster. Prior to the ko, though, it was Pac who made the adjustments and JMM was reeling. Hard to compare to Kats and Diaz because of the skill and weight disparity. Not really. If that was the case, their 4 fights wouldn't have been as competitive as they were. I think that "they are made for each other" is the more appropriate and fitting description.