To be frank he looks bit off but I can’t attest to the other factors. All things said he needs time to adjust to be set up with new players it goes under the radar our front attackers are young and still gelling. They will click and it will be something!3 things.
Growing <1 inch is not a growth spurt, it's definitely not the type that makes you lose coordination. Growth spurts are 4,5,6 inches a year.
The fact he grew an inch last year doesn't mean he's growing now.
The fact he was the best striker in the world last year while growing an inch disproves any theory that he's suffering this season because he's still growing. Unless you think he's grown several inches since September?