Pac has changed but his basis is still the same.
Morales beat him using boxing skills though, an area in which Marquez is bette than Morales in.
Marquez has a solid defence so he can take risks.
Pacquiao's camp have never been the most tactically astute in Manny's fights.
People who beat Marquez out speed him, pac could, but won't. It's not his style.
Pacquiao's speed is incredibly overrated, and Marquez's underrated. Pac's fast but not that much more than JMM.