By his own admission the pressure of the fee and new club expectations impacted him. As did Poch’s system. He really started to find his feet in that system once Gallagher was next to him, and he’s gone up multiple levels since then.
Just an immense player. There are players we’ve had over the years that when their name is on the team sheet you have a sense of reassurance - modern era examples, Terry, Carvalho, A. Cole, Maka, Essien, Lamps, Drogs, Hazard, Costa, Ivanovic, Dave, Willian - list could go on. He’s in good company already at this early stage of his Chelsea career.