That has been my suggestion right from the onset, Pep ideology isn't impacting the team any longer therefore there isn't any need for him to stay at Manchester city for another season irrespective of the ban or not and obviously the ban will motivate his departure. Pep managerial career is built on a third season success, anything more than that usually ends badly.
I don't think him returning to managing Barcelona football club is a great idea although maybe him returning to spain (la liga) will be the best move since the premier league is becoming too complicated for him and don't think there's any other club that can suit his stay of play.
Concerning the fifth position battle, obviously tottenham aren't ruled out of the picture as Mourinho is capable of achieving anything as a manager. But was making an assumption of the table remaining in this manner for the rest of the season.