IF Grealish is indeed sold I'd be OK with a transition/rebuild season where we bring in players with a long term plan rather than "win now" players.
We are never going to be able to replace Grealish with any player we can attract, but we can build a team with the money that makes us better than we currently are if we give it time and are smart. Even thou there are no doubt players in the PL that could improve us or help us I'd generally like us to look abroad for signings. Value in money is night and day but of course it means more job for the coaches to help these player integrate, settle and learn the league.
It is a marathon not a sprint.
Obviously I'd rather Grealish stayed and we built that team around him.