Zba problems are all mental and his no warrior spirit. When he gets dragged in to the late rounds of a tough and brutal fight he just gives up and goes in to a shell.
He's also not very versatile with what he does in the ring either. Even with the right mental attitude, boxers like Floyd or Delahoya will be able to figure him out, neutralize him and beat him.
Take out a quick southpaw with a left hook in the first? Not likely. It would most likely be a straight right that hurts Judah in the early rounds and then possibly a left hook on the ear later, but I'm saying it will still be the right that finishes him midway through....well a right followed up by a barrage.