If I were advising Bennett, and I had his ear on this issue, I'd sell it to him like this:
Re-sign Oates on the sort of figure he'd be keen on alongside selling to him the convenience of staying in Brisbane and playing in the forwards, under the arrangement that for the opening 7 rounds of next year, he'll come off the bench as a second rower and Pearson comes onto the wing. If he proves himself there, he comes into the starting side, TPJ moves to Lock and McGuire goes back to Prop to partner Joe O/Lodge in the 10. If he doesn't fire, he moves back to Winger no questions asked and regular programming resumes.
7 rounds of footy with training in between is ample time for a player with his experience to adjust, so he can't whinge that he got the short end. The only negative of this setup I can see is taking TPJ out of the 12, which I can see plenty of people around here not being a fan of. Positives though, seem worth it to me. We keep Oates, Pearson gets a decent shot at 1st grade, and even if he fails to fire we have Oates there ready and waiting to slot right back in. I'd love to see what TPJ can do with that offload at Lock as well.