He's 23, and after a year of loaning he'll be 24, so he isn't a youngster. And he went out on loan when he was 20. Look at Marchisio. That's what Giovinco should be like.
What he needs isn't experience, but a coach with some faith. I also think Juventus are in the perfect position to give him a proper chance because we're not expecting to dominate the world anytime soon.