With all due respect I think Ferrara might not be the right one for this Juve.
His inexperience really hurts the team. Except in the friendlies and in the match versus Roma, he has always been outwitted by the opponent's coaches: Gasperini, Blanc, Van Gaal and even Zenga and Papadopulo, you name it. Had Buffon & Co not have such heroic performances and had we not been that lucky, we would have been lost right at the first game against Chievo (remember the torture they gave us in the second half?).
Stubborn (always stick to the 4-3-1-2, always use 2 strikers etc), clueless (don't know what to do when we were losing), lack of match preparation skills (that was obvious) and lack of motivation skills (what did he do to make fighters like Iaquita and Amauri to act like a lazy-ass in match last night?) are his characters right now.
Of course he can learn and I believe he has the potential to become a good coach, but after spending like 60m this season, can we wait for him to learn from his mistakes? Every point we might lose at this moment would cost us dearly in the future.
But that is not the biggest problem. I fear that the biggest problem is: the longer the team fail to get a good result, the less the players put their trust in Ferrara. If the problem persists, one day they might just ignore the coach and do what they want in the pitch and that is something should never be allowed to happen in Juve.
So, my only hope is that Ferrara is able to learn and fix all the problems quickly in this two international week (and I doubt he is able to do that). Otherwise, the best way might be just to find a replacement coach. The only available option that I can see right now is Spaletti and if we want him we should act quick. Surely he is not perfect but I believe he would be much more experienced that Ferrara and would have done better than him. This serie A already has a Leonardo and that's enough!