Let me say that Lippi is a magnificent coach who can do miracles from time to time but let's not forget: when he won the World Cup last year, it was the first big price in years for him, though he played a few finals in the CL with Juve.
Must he come back? I don't think so, not as a coach. Give Deschamps his chance, together with the team, we may not forget that after what happened last year Juventus is now building for the future...with Deschamps. And though he lost his first game recently, he's doing a great job. Not only Lippi, but Deschamps as well can lead us back to Serie A, there's no doubt about that!
And let Deschamps stay, watch what will happen next season and then we'll see if he can handle it or not. Some people seem to forget that Didier lead Monaco to the Champions League-final a couple years ago, how long was he coach then? That prooves the man has skills, not only as a player.
We had wonderfull times with Lippi, and we must be thankfull for that but now we have Deschamps and we must be thankfull to him too because he wanted to coach Juve in any division.