A few areas where I think Cheika has taken a gamble.
Alan Ala'alatoa at reserve THP is a worrying call to me. And it is simply a matter of Cheika pulling rank on the Brumbies where there are three good quality Super Rugby level THPs already in Alexander, Makin and Ruan Smith. No need for AA to switch over when he is the back up LHP at Super Rugby level, and ceryainly not in the Brumbies' best interests and quite possibly not in the Wallabies' as well. Why not Robertson?
McCalman in place of Fardy is also a risk. His workload is good but he is mostly ineffectual with ball in hand. Combined with Simmons who is also a wimp in contact, and the very small backrow partners of Hooper and Pocock, I can see us being blown off the park by the ABs' forwards.
Mumm then compounds that situation when and if he gets on. Where is the mongrel meant to come from in a pack made up largely by powder puffs.
And in my view, Rob Horne hasn't done enough since the RWC, and especially against the English, to warrant a spot on the bench. Prior to this year he was always good value, but this year he's missed a lot of tackles and his speed seems to have diminished significantly.
I expect this side to fight the good fight against the ABs, but in the end class will prevail and we'll go down quite comfortably.