It's hard with the Quade Cooper makeover. Those who have seen him at the remain behind and take extra time to talk to fans know what time and effort he puts in. I've also heard numerous stories about the extra time he puts into fan days, kids rugby visits and schoolds visits. The QRU has done well with Quade in that regard.
One anecdote: my friend and I flew up for every Reds game in 2011. We hadn't gotten any Reds signatures, and decided to get some after the Brumbies game. Unfortunately, the Reds lost and not many Reds players hung around after the game to sign autographs, with just about 3 players going around the field (the Finger twins and one more I think). My friend ran off, and got just one in the end: Quade Cooper, who came back out down the tunnel alone to sign autographs when nearly all of the other Reds had gone back to the dressing room and stayed there.
Stuff like that is why the Reds fans love Quade Cooper besides the risky plays (complete with spectacular outcomes and added errors), and I don't think opposing fans see that side of him, and nor do plenty of opposing fans want to as he's a character they already love to hate.
I guess my point is, the QRU have done an OK job at a Quade Cooper makeover in Queensland already. And, the makeover is ongoing, and will be ongoing so long as Cooper is at the Reds. It will continue to be done through schools visits, and junior rugby and country rugby visits, at fan days, and staying back and spending up to an hour post-game with the fans, even after a loss and most of the rest of the team has departed. (This is another reason the Finger twins have been great for the Reds, like Cooper they have been great off the field for the fans.)
If you're talking about ways to make opposing fans love him, I think that's not going to happen overnight. If Quade Cooper continues on his current path of improving his defence, improving his ruck work, and lessening his errors, then he will eventually earn the grudging respect. But it's a long path, and while Cooper's defence has undoubtedly improved this year, it will take time to earn respect and make people notice.