You are right Mica, I like to look at Barnes as more of a conductor.
What Berrick does is stabilise the back-line, he doesn't use flashy one off individual solo efforts and he plays to his strengths. He complements his great short passing game with very accurate tactical kicking. He doesn't have the flair or the step of a Cooper and he knows his limitations, he keeps a level head under pressure and goes with percentage plays. Also has the leadership and nous to be able to tell players where to stand and direct them around the park into positions where they can be of assistance. When watching him you just feel as if he is a team player.
Cooper seems quite the opposite, the solo running and long passing he displays can provide x-factor in the back line. He's unpredictable and can open defensive combinations very easily, the guy would much rather run and pass the ball out of his 22 than go for the traditional boot upfield for field position. He has the speed and confidence to take players on 1v1 and usually succeeds. What I don't like about Cooper is that he doesn't know when to play safe, he expects the other players around him to know what he is doing and thus gets angry when things don't go right. As a player, it must get frustrating to play with, being expected to read the mind of a playmaker is never easy, an unpredictable playmaker makes it even more difficult. Add to this his defence and you get a player who is either really hot or really cold, either end of the spectrum can result in a 50-0 win or 50-0 loss.
It's all speculation now but I think with a full uninjured season at 10 for the Tahs and Barnes would have been our first choice fly-half regardless of the Reds success. He offers consistency, accurate kicking, brilliant short passing game and a great temperament, that and he can contribute in defence without requiring the team playing around him. Cooper is however our best choice 10 as it is, he's gaining experience every game and the more mistakes he makes the more he learns, unfortunately now is not the time for mistakes. The short-term fix for this situation is Barnes at 12 to neutralise Cooper and I think that will be the approach Deans takes, until the guy can play the game without making stupid decisions he will remain a player with potential who never quite made it to greatness.