What do you mean? Messi's return won't be too bad for the team I think, but only if their financial situation improves, even if it's a year from now. I think Leo himself would very much like to finish his career at Barcelona, probably why the door to this team is not closed to him. And in principle he has a pretty good relationship with the management and the team
To finish his career, yeah he can return. However this isn't the right time to return for him. His wage demands wouldn't be low even if he accepts a pay cut. Barcelona need to stop bringing players from now on to be able to keep their finance better. They should think of the future as well. In addition to all of these, Xavi has been using new game strategies for the team and it has been working really nicely. In case Messi returns sooner than I expect then all the plans would be gone all of a sudden.