I can see he does good things down back, but his bad things and particularly his bad examples (esp the chips sideways) outweigh them now.
Still, I think he has been great up forward, and I would like to see him spend at least another year with us, playing (at least predominantly) up there. Good hands, cool head, goal-kicker. The new position might revitalise him; he won't need too much learning, as he's experienced there; and there'll be less temptation to fall into old habits.
A bit of defensive work might set a good example to some of our other forwards.