It's too early. His issue right now isn't with fans, it's with organizations that can pretty much end his career. Last summer he won a third Tour de France at age 27. If that's taken away from him, and he loses future salary and sponsors, what's the motivation for him to keep training on his own with no income and try to win a third Tour de France again. If he's banned, he doesn't need to prove anything to fans, just like he doesn't need to come back and subject himself to the kind of insults he receives on an hourly basis here and in the press.
If he wins two legal battles, and most of the "fans" and press don't give him a snowball's chance, then he can think about regaining his reputation among the open minded people in the sport. People are talking about a rest day transfusion as if it's carved on stone that he did it, but all I can think of is the days he struggled on climbs, and how bad he sucked in the Time Trial. If he did something illegal, it didn't work.
Some people hate him because he's Spanish. Some don't like him because he wins. A lot of people want him gone because then their favorite would have a better chance to win. Some think everyone dopes. None of them are likely to change their minds because of published test data. Some people believe him now.
People who care about the sport, and want it clean, should be rooting for the Competition Committee to find him innocent, because a lot can be brought to light if he does battle with the UCI and WADA. They've gotten some serious stuff wrong, including the UCI trying to sweep it under the rug. If he wins the first round, you can find out about lab delays, and leaks, and organizational bad behavior. Alberto probably has well over ten million Euros hanging in the balance on all this - two years of Saxo salary, three months of Astana, personal endorsements. He's in a position to give the two (too) powerful organizations the fight of their lives. And it's good for the sport if it plays out. The UCI lost the Vino salary decision because they were wrong. They lost the Pellizotti bio passport case. I don't know a thing about Caucchioli, if he's innocent or the dirtiest rider since the invention of the wheel, but I'm rooting for him at the CAS this month because the UCI needs to be schooled on the facade that's the bio passport system.
So Alberto has some serious dragons to slay. Once the dust settles, if he's still in the sport, he can work to sway the people who still haven't made up their minds one way or another. If he's gone, there's no reason for him to care. But all the good will gestures in the world right now wouldn't hold up to the next inevitable round of mudslinging in the press.