the hooks are still thrown honest and true and id you not see the jabs he threw to open up RJJ's eye they were proper punches. yes there are flurries but they do land and are thrown with some power and they do connect with the correct part of the glove. Yes he can up the speed and throw shots which just hit and do no damage but that is not all he does
Calzaghe does not, at no point in his career, have enough power to trouble Hopkins, who has an iron chin. Therefor, Hopkins ups his work-rate and wins the fight.