Reading these posts it seems that a lot of people have decided that Dean Mumm is already a dud selection just because the returning players rule wasn't successful for Elsom, Vickerman and Burgess. I think people need to remember that the post match threads after last year's tests were littered with criticism of the performances of our locks. We have identified a couple of emerging talents this season and Skelton has improved but we have also lost Carter indefinitely. So it's likely that the coaches are still viewing that as an area of vulnerability for the Wallabies and therefore are going to explore all of our alternatives. Mumm wasn't the best player when he left but he has 3 seasons of NH experience since then and the only way to line him up against the alternatives is to put him on the park. The fact that he is still in the squad implies that he performed well enough during last week's training camp.
The same goes for Giteau & Mitchell.
As for Kane Douglas, he is a completely different kettle of fish. He has simply realised that he made a bad call and has changed his mind, and wants to return to Australia. The only people suggesting that he will get a world cup call up are the media. Realistically he won't play for the Wallabies this year but as from next season if he is playing super rugby here he is just as entitled to be selected as anyone else. And that's how the KD show will play out, IF he can get a release from Leinster.