We need to give Marotta some credit. Vidal cost 10m, Pogba 0m, Llorente 0m, Tevez 10m, Barzagli & Pirlo 0m. Those players make up the nucleus of the team for a total transfer fee of around 20m. Vidal & Pogba alone would be worth EU100m collectively, Llorente is probably worth 18-20 and Tevez is at least worth the same for what we paid for him. He has created value of at least 120m on those alone.
Of course he has made mistakes. But the net result is still positive.
Imagine if France wins the world cup. Pogba will be worth a bomb. If someone wants to spend 100m on him (ala Real Madrid), we could truly become a world class team because when it comes to the squad we are loaded with quality in the CM area more than any other. We could use the proceeds to have a much more competitive overall squad. Still wouldn't want him to go of course.