I don't think anyone can really argue that the academy's results have improved since they've left.
How much of that is down to their influence is the big question.
Actually perversely this could be a good thing. He took a lot of criticism and will want to prove he isn't a big/home team ref.
He could overcompensate.
I really don't see this happening. We will lose Pelle, Mane and Vic in the summer (hopefully not Bertrand) and I will be royally ticked off but life will go on.
To be fair, that's just fans being fickle as they loved him to start. Bit like all of ours with Pelle, "he's useless!" *goes on 6 game scoring streak* "he's amazing!"