I'm not a big fan of Delneri, but I have to say that after 5 years of bashing every single coach that managed Juve, it seems the real problem is our squad and the way our transfer budget is spent whether it's Marotta's fault, Agnelli's or still Secco's.
As a big fan of the great Lippi, I believe that the biggest mistake was not signing good fullbacks to build a strong defense line, that's the base of a really good team. The 12 millions paid for Martinez, the 500k paid to loan Traore, the 1.25 million paid for Motta, the 600k paid for a player called Rinaudo? That's a total of a good 15 millions that can bring us two very good fullbacks.
Now, does Bonucci deserve a 15 millions price tag? Why do you sign a goalkeeper for 4 millions when you know that you're not gonna use him for more than 6 months and he's already 33 years old? Letting go of Trezeguet and not selling Amauri in the summer (not sure if some team actually approached that piece of crap)? Then, signing Toni?! and Barzagli a centre back when you have Bonucci, Chiellini, Legrottaglie, Sorensen and this Rinaudo guy?
Fix the management first, who brought Delneri and controlled our transfer policy.