Cant say I'm not a little bit concerned about Cheika giving favouritism to his Tah players on the EOYT and for the WC next year. I think Cooper is our best 5/8 but I doubt we'll see much of him with Cheika in-charge.
On the bigger picture, I'm very concerned that the likes of Dave Dennis, Patty Ryan, Betham, etc will find their way into the world cup squad ahead of better options. Also I wouldn't put it past Cheika to choose Beale as our starting 12 (provided he is around).
How Cheika uses Cooper on tour will be a big indicator for me. I think Foley has done a great job this season, and Im not necessarily saying that he should make way for Cooper, but in Cooper Cheika has a player with a unique skill set that IMHO is best able to exploit our strengths as a team. Our strength on tour, and at the WC next year, will be our outside backs. Kuridrani, Folau, Speight, AAC (Adam Ashley-Cooper) (and next year JOC (James O'Connor)). Cooper's long passing game is unmatched in world rugby. His ability to hit guys out wide with one pass gives us the ability to give our strike weapons as much time and space as possible to work their magic. Will Cheika recognise that opportunity and use the next 5 matches to develop that game, or will he stick with the tried and tested players.