I actually agree that I don't think we're seeing Ederson's full potential. He's very good, but he's not in the conversation for best keeper in the world anywhere outside a few City fans and I think he could be if he improved a few areas.
I'm not sure I rate Xabi Mancisidor, our GK coach. He oversaw Hart's decline, he didn't arrest Bravo's freefall, and outside penalty shootouts never managed to get Caballero to fit the style of play. Steffen's ball playing is still a very noticeable drop off compared to Ederson whenever he plays, and you'd think 2 years of training would make him look comfortable.
David Preece (a GK coach) has said that Hart's decline came about because whereas Mancini's GK coach, Massimo Battara, always made him work on his weaknesses every day, Mancisidor came in and let Hart decide what he wanted to do, and Hart chose what he was good at.
The result of that after a few years was Hart's weaknesses got more and more exaggerated.
I wonder if something similar is not happening with Ederson. His record on 1v1's and penalties continues to get worse and worse, which makes me think they're not trying to fix them, and might well be just focusing on what he's already the best in the world at.
Ederson is by all reports a very chilled, laid back character, and I wonder if he's the sort to self-police
He was a much better shot stopper at Benfica, so I know he can do it and I actually think he looks better when he goes to Brazil and works under Taffarel for a bit, although that might just be going head to head with Alisson in training every day.
I reckon when Pep eventually leaves, we will see him improve those other areas of his game markedly and he'll be the best all round keeper in the world, because he's already the best with his feet and the most dominant aerially in his box.