Bring him back by all means but only if he's had a successful head transplant.
Because Joe's issue compared to others is rapid analysis and speedy decision making when he has the ball. It's beyond him. But this sense of uninterrupted flow as the ball cycles in and amongst the back line is critical for Pep's style of play.
It also will not help if he is perceived by some as being a tad toxic, based on what when on in the Mancini days.
Whilst he's a better shot-stopper, traditional goalie and strong character on the pitch than anything we have currently - all the songs in the world will not change the situation.