Well that's why there is the buyback clause, in case he somehow happens to turn into something. Not expecting it though, but of course I hope so.
he's 21, and in his first complete serie a season, he managed 2,5 tackles (15th in the league) and 2,5 interceptions (5th in the league) per games according to whoscored. combine these two stats, and only badelj (2,6+2,6) did better than mandragora. no one is even close to these stats in our team, not even our experienced french dm. add his pass accuracy of 80% in a very weak team (only the two central defenders did better, which is quite expected), and the fact that he's never been subbed out, and you have an impressive first season for a youngster. in this inflated market, he's absolutely worth those rumored 20 millions, and since we don't have a properly defending midfielder since vidal left, plus we're basically out of italian midfielders/strikers, the recompra option is a must for juve. in fact, i do think that he might have been in the squad in either matuidi's or sturaro's place, and he would offer a better performance for much less money.