Take it with a grain of salt since it's TS but today they're suggesting Marotta isn't really happy with Berardi's development and he won't pay the fixed price of 15m for him. They suggest he'll try to lower it and send him on loan again or give away his half for Zaza's who supposedly is seen as more mature and ready player.
The things that worry the management is his attitude according to them (lots of yellow and red cards) but also his inconsistency. If Marotta gives him away to Sass he'll want to inject a clause similar to the one Zaza has which would give us the option to buy him back.
Opinions on this? I don't think loaning him out again will help his development. He has very good stats i Serie A. Being at Juve would be better for his growth, especially when it comes to mental issues.