I think its less that he's lazy, and more that he's used up. Fullbacks don't normally defend in the line for a reason, and add to that he's a captain, in his thirties and it all begins to add up.
That drop catch he did, against the eels, is the first one i have seen in 3 years from him. There may be others but theyre rare. Whilst radrada ran through him easily, he did the same against Roberts, who is much faster. For those critisizing him, its worth remembering, whilst he rarely if ever has broken the line on returns, he is also one of the safest taking the ball out of his in goal area, has been inspirational at times in defence, and usually contributes more on 2nd and 3rd tackles than most fullbacks do. Those things aren't always noticed, but believe me, getting out and avoiding repeat sets are not to quibbled at. Nor is a driving tackle from your fullback and captain something to be ignored. He tries hard but isn't a machine that can run endlessly without hiccups and even machines break down when run too long. I think he needs a break. If he isn't rested it might be time for wb to let him off some training and just get away to someplace quiet with the family to recharge.