BH I am not really trying to disagree with you entirely. I think our lack of depth means there are times when we will have to try and pick the best players and adapt, but I also think some of our selections (such as front row, and to a lesser degree half back) are consistent with the approach of picking players to suit a game plan.
There is a quite interesting post somewhere on this site which talks about the ABs specifically excluding some players from the selection process due to their perceived lack of ability to suit the game plan.
I do see a number of players who will have to change/adapt their game to meet Cheika's requirements. Number one is Genia who, even in best form, does not tend to pass straight from the deck but rather run at defenders to play others into space. Despite the criticism he has received, it is very effective when done well (unfortunately Genia hasn't been doing it well for a while), but it is at odds with Cheika's plan.
I also think there will be implications to the selection of our back row.