Wonder if he is carrying an injury. He's played the entire year with a lot of sticky tape on his leg. If fit I have no concerns about him going up against Olam again, all year he's taken care of the likes of Kikau, Fifita, Best.
His defence has been aggressive and in your face, so i don't know why he's now backing off instead of going forward. I thought defence problems out wide usually start with what is happening (or not happening) inside - maybe inside defenders are not coming across fast enough?