Oz rugby has proven recently that we have an inability to develop these young talented 10s into super/intl standard playmakers. Grab one of these intl standard 10s and let them pass on knowledge and experience they have gathered over a lengthy career. Certainly can't hurt. No idea who they could actually get as it was my answer to a hypothetical question.
I question whether a lot of the recent 10s we've fielded at the Under 20 RWC are really international standard. 2019 was the first year in a fair while that we've had more than a couple of players that were in the top tier of players.
I don't think anyone could have watched the years where we had Jack Debreczeni, Luke Burton, Andrew Deegan, Mack Mason and Hamish Stewart playing 10 and thought they were destined to be world class players when compared to some of the 10s also playing in the competition.