I have decided to keep an open mind as to his credentials. I admire the fact he branched out and made a big success of his time at Hogwarts in Sweden. I also think he deserves credit for making Brighton an attractive side. However, I worry that much of his success there was due to the behind-the-scenes set-up at that progressive club rather than any magic potion our putative wizard may possess.
His time at Chelsea was a disaster - and he cannot be compared to people like Tuchel who won a Champions League there despite the dysfunction. Yet, I accept that many good managers struggle and, indeed, fail at such a club in such turmoil.
All that said, I don't think he would handle the pressure of rebuilding Everton. He really showed a very weak side of himself in how he handled the gleeful taunts of his former Brighton fans when he took his Chelsea back to the Credit Card Stadium for a ritual disemboweling. The entitlement of the man to take umbrage at his treatment exposed a very brittle humour that makes me doubt his character. Obviously, I'm no psychologist, but it wasn't the look of a man who was confident enough to genuinely brush off such treatment.
Nevertheless, we do need a magician right now and a replacement for He Who Must Not Be Named.
PS I'd actually prefer the Dark Lord - but I doubt José would entertain working again for the Friedkins even in the unlikely event they would entertain taking him back from Azkaban Istanbul.