Rovella has the vision and passing to be a good deep-lying playmaker. He likes asking for the ball from defenders, trying to be the starting point in the build-up phase. He can hold the ball under pressure, distribute it around and make forward pass. All that makes him a natural regista.
However in Allegri 2.0 sYStEm he'll find no options around to pass the ball to, people just stand there sitting out. Locatelli was an elite passer at Sass but look what Allegri had done to him last season. Its almost certain that Rovella will be in the same boat under Allegri.
I am all for keeping Rovella but I don't expect much from him as long as Allegri is the coach.