The way I see it Barkley came in and made a mistake , his head dropped and so Moyes pulled him out of the firing line
If the mistake is playing on his mind and his confidence has gone but we continue playing him it could ruin him for good, especially given how fickle some Evertonians are they would soon turn on the lad ( ala. Osman, Hibbo, Arteta, Cahill, Neville) Moyes sees him every day in training and if he says his head is down and he is off the pace then I have no reason not to believe him.
Barkleys time will come, people seem to forget the lad is only 18 and he has missed the best part of 2 years development through injury
I still trust the manager clearly a lot of people in here dont