Lets have a look @ the "Great" Number 10's of our time, of their own respective countries, Stephen Larkham?- Definitely, Andrew Merhtens?-Mmm, yeah. Jonny Wilkinson?-Definitely, Dan Carter?-Definitely.
What do all these players have in common? They controlled the game well, conservative when it needed to be, they all run well when needed. Barring Larkham, who was freakishly talented with his running game, most dominated with the boot, both out of hand and goal kicking.
Somehow I don't think Cooper fits the mould. His very risky, flashy game is the anti-thesis of what a dominant, great, First five needs. If you shackle him by getting him to play a field position orientated, conservative game he loses the "X-factor" ability he brings.
At 23, it's early in Cooper's career, Carter was @ his best against the Lions 2005 @ 23. Even given that, I'm calling it early and saying Cooper will never be one of the "great" First five's. Entertaining - absolutely, Dangerous - definitely, Talented - outrageously, Great - nope.