Well put
He’s still only 18 , 19 in January. It would be extremely unfair to ask him to on a very important role as a 6 where he would need to be constantly switched on ,able to read the game and turn defence into attack.
Not many ( if any ) 18/19 yr olds would be given such responsibility in a first team in the PL
Let him do another year on loan and learn the game better by playing week in week out rather than a few minutes here and there
Moyes obviously sees the potential in him and will want him as a long term part of the squad