Juve needs a new fresh blood, both in management and players. Like Milan and Barca, Juve should hire a young manager with an attackting style of football, someone who won't over use the old players and won't be afraid to play the young guns. The likes of Giovinco and De Celgie should be given there chances, sure they won't do worse than the likes of Grosso Grygera and Salihamidzic.
Delneri is too stubborn to play the likes of Gio, Ceglie and Sorensen regularly, and if Juve brought a big name manager, that manager will have lot's of expectations on him, and would be too afraid to use the youth, and would depend on the experienced players in order to get the best results.
It's a big gamble, but it's one that pays well if worked.