Just seen the incident in the Preston v Arsenal game. That was a foul, perhaps a bit more obvious, but still an arm in the face of the keeper just like Vokes's challenge.
As for City and the diamond........a Chicken and egg situation? I think that something clicked against West Ham, or at least l am hoping that it did. But it isn't one single change imo, it will be a combination of things - the cumulative effect of Pep's coaching; the change in formation; the confidence everyone gets from not conceding oral within the first ten minutes of the game; the confidence that Caballero's experience of English football provided etc. Pep has alluded to the players 'getting it' and I think we my just have seen the first signs.
On Caballero's influence - I noticed how rapidly and confidently he got the ball into play again. This is not a new thing - it was always a stark contrast to Joe Hart btw.
He recycled the ball much more quickly than I have seen Bravo and I think it completely supports the view that Bravo's confidence is pretty much shot at the moment. It was a sign of Caballero's confidence that he was prepared to throw the ball out more quickly for example and conversely I think Bravo, having been caught out before, having been under such pressure both physically and mentally, has had the confidence sapped from him. Once bitten, twice shy is the saying and I am sure this affects his positioning and his decision making.