Now it's said that history doesn't repeat but it often rhymes and we may be looking at a similar situation to that which followed the loss to the Lions in 1989. I recall listening to an interview with Nick Farr-Jones, who indicated that our G&GR favourite son Bob Dwyer initiated a clean out in Wallaby ranks that set us on the path to winning the RWC, Bleddie and all manner of other silverware over the next 3-4 years. So Braveheart, I agree with the premise of your original post and expand on it below.
There are some blokes whose role in the Wallaby set up will change, some who will miss out altogether and others who will step up and become significant players. In terms of the incumbents whose days might be numbered:
Ben Alexander -- as a prop your primary role in the team is to scrummage and he got shown up badly on the weekend. I think he's done his reputation some pretty serious harm and it would be a long road back now.
Kane Douglas -- I hope not, but his impact on the game in tests 2 and 3 wasn't great enough. We need someone of his kind of make up to partner Horwill and I hope it's him, but he will need to step up again and demand selection.
Wycliff Palu -- I've said before that the concept of Cliffy is often better than the reality and I wonder if he might getting to the end of the road. I think the big fella on his day provides great impact, but he's been broken a lot in the last couple of years and I still feel he goes missing in big games.
James O'Connor -- it's not all his fault. The selection at 10 for this series was almost universally slammed by all and sundry here at G&GR and the three tests showed that it's just not his best position. Much like Horan being shoe horned in at 10 by Greg Smith, it's not worked and harmed the other players in the backline. What he does have to take responsibility for, however, is his perceived attitude and behaviour problems. The fact that the Rebels now don't want him must be a huge concern over his future.
Pat McCabe -- firstly it's his health. He's had a couple of pretty serious neck injuries and I question if he can come back a second time. He's got ticker in spades so you'd never rule it out. The biggest problem McCabe has is that like JOC (James O'Connor), he's been played out of position. He's not a test 12. I think he's got the potential to be a good test 13 or wing.
Berrick Barnes -- see McCabe. I feel for Berrick. He's had so many head knocks now that I think someone needs to tap him on the shoulder and say mate for the sake of your health and your family hang up the boots.
Kurtley Beale -- like JOC (James O'Connor), there are significant questions over KB (Kurtley Beale). His off field struggles are well known and we don't even know where he'll be playing next year. Huge, huge talent but also like JOC (James O'Connor) he has some maturing to do.
In terms of guys who could come into serious contention with a changing of the guard:
Scott Sio
Hugh Pyle
Kyle Godwin
Matt To'omua
Rob Horne reborn as a test 12