I don't think there can be much doubt that Moyes prefers premier league experienced players over youth & that it usually takes some time for him to trust them, hence playing new recruits out of position on the wings.
Everton's starting XI for their 3-0 home win on Saturday had an average age of 29 years and 25 days compared with Chelsea's 24 years and 208 days.
This article from a year ago is rather telling with West Ham & Everton having the joint average oldest starting 11’s:
19=) West Ham United – 28.3
Now that’s what we call a David Moyes squad; Mohammed Kudus is the only West Ham player under the age of 27 to start more than 10 games.
19=) Everton – 28.3
So Moyes must feel at home in more ways than one at Everton, where 39-year-old Ashley Young is joined by first-teamers James Tarkowski, Idrissa Gueye and Abdoulaye Doucoure in the ‘old heads’ club.
18) Fulham – 27.8
Last year’s oldest team have actually defied time and got a little younger with the additions of Emile Smith Rowe, Sander Berge and Joachim Andersen and the exit of the ancient Tim Ream.