I trust Marotta, however this does feel a little arkward, especially considering we have Moratta and Tevez. I would that sort of money spent on a left back and a replacement for Pirlo. Even if we do sign him, would he even start?
We play a two-man front line and we have only two reliable forwards (Tevez, Morata). How is that a problem? In fact we'll need someone else to complete our attack for next season. Dybala alone won't be enough.
Besides our management know replacing Tevez will be very difficult. He'll leave in 2016 for sure and it's obvious they need to plan how to replace him. There's Dybala who IMO in terms of style and role perfectly fits our needs. He'll play his first season as rotation player to Tevez so the pressure won't be too high for the kid, he'll have the time to settle in.
I'm sure Allegri will rotate Tevez more with Dybala being available to him. They can play together too. Another option is to play a front line of three Tevez - Morata - Dybala with inside forwards like Barca does this year.
In our situation a player like Dybala is necessity not luxury.
I haven't seen him play much, but he has an unvaluable quality: intelligence (and some sort of flair / creativity /vision).
This is very rare in today's game, and sometimes underrated.

Even when he doesn't score he's always capable of creating something for his team mates. His number of assists reflects it perfectly but in all honesty his team mates let him down quite often with their finishing
