On the Foley/Barnes thing, they may well both be in the starting XV (probably will be), not sure if they'll be swapped around though. The Randwick way was always to keep players in position and bring the next best up, they knew the calls and what was expected in that position. We'll know more after trials - I can't wait.
Super Rugby is very different to club rugby though. They have to make do with a squad involving limited players. They also train as a squad which means players should be familiar with everything that is going on, not just what is expected from a specific position. Training in club rugby is very different because reserves will be more used to training with the lower team they play for on a weekly basis rather than the team above where they might come on as a reserve.
I suspect where BB plays will have an impact on Carter. It might end up Foley at 10, BB at 12 and AAC (Adam Ashley-Cooper) at 15. That might stop BB kicking the ball.
You make it sound like the ineptitude of the Waratahs' backs last year was because Barnes kept kicking the ball. That was the least of their problems. The major problem was that with ball in hand they struggled to make the gain line all season. Whilst Barnes was 10 for a lot of the season and must be held accountable to a degree, I don't think the problem was because he was kicking it too much.