I don't theink Cotto was struggled by Corly. It was very one sided. Corly got one good shot in but was easily beaten. Corly was struggling with Cottos power throughout the fight.
He came in wearing a stupid mask looking a idiot and i think he left in very much the same manner.

As for calling Corly good. You must think people like Junior Witter are pure ledgends.
Looking at it Corly beat Felix Flores a very poor boxer for the WBO defended it against poor boxers.