I don't think it was quit before he was sacked my guess is he's just tired of working with these players and not getting lorded for his achievement.
I mean you win the European Cup and your two superstar players and both on the pitch moaning about moving away after a while you must wonder what is the point in this, might just want a break to spend a bit of time with the family.
2 1/2 seasons 3 CL and 1 league title is some going.
Will he go back upstairs?
Could it be he knows the rebuild that's coming this season and didn't fancy that job.
Be interesting to see who comes in? For years Perez wanted Wenger as his coach but that was a long time ago, would Luis Enrique cross the divide again, could they get Allegri to change his mind, could they get Mourinho back (loved by he president/hated by the fans), is the ink dry yet on that Pochetinno deal?