Well we're in a situation where we're not getting relegated and not favourites to qualify for Europe.
I think the manager can afford to look at it like this:
1. McNeil is off in the summer
2. Dibling was bought very expensively
As a result, even if he comes in and plays badly, it's a no-brainer to give young Tyler an extended run in the side, because at his worst he'd only be as bad as McNeil anyway.
That should make him first backup to George in terms of selection, anyway, or rotating, or starting with Dewsbury Hall deeper and no Gueye.