The way you defended Lambert for so long and are so quick to jump on his replacement shows there's little point answering your question seriously.
Why respond to him in the first place then?
He seems to manage the same way I play Football Manager. Choose my tactic and stick to it rigidly throughout the game even if i'm not doing well. The difference is, If it goes tits up for me I can just reload the game If I need to.
Grealish is not taking a **** dive there. Caulker has full on swung at the ball and Grealish knows he's moving it away from him first and is avoiding the follow through.