I've been thinking why does pep want Grealish so much? During his spell in charge of Barcelona he had Messi who was a game changer both in domestic competitions and European. Then, he went to Bayern where he had amazing talent BUT no game changers. I think after losing the champions league to Chelsea he needed that one player who could change the game.
Now, Messi and Ronaldo are both great players based in their longevity and insane goal records - I think grealish is in that mold but not from insane scoring statistics but his ability to draw fouls and create chances for the team.
Jack should stay one more year and if we did worse than last season i respect his decision to leave.