This is a very solid team, if they stay healty and Mancini learn how to coach they have a better squad than Roma IMO. And they are still in the running for Persic.
He's severely damaged goods, that's why he ends up at a team like Inter for €15m. You're judging him on the talent and player he was at Fiorentina.
But it's a fairly low risk move from Inter, aside from the obligation clause. Hopefully they have to pay €3m + €15m for a complete crock, because they hardly have money to throw away, and not being in the CL next season looks like it would be financially crippling.
Silly to make predictions at this point in time in any way, but if I had to:
Juve
Roma
Inter
Napoli
Lazio/Milan (don't know anything about Lazio's mercato so far)