I find it quite strange to suggest Jack in our creative mid when we have seen hundreds of times what he does when he turns inside:
he doesn't have his head up to screen the pitch 360,
he can't decide quick enough to pass or to shoot,
he isn't aggressive enough to get into the box as he doesn't trust his own finish or
he runs across the field or back to defence with no impact to then do a 5 yard pass and stroll back to where he came from.
Pep must have seen it in training a thousand times.
He doesn't have the vision nor the quick decision making you need in a tighter mid vs deep sitting and pressing teams. We know all that. He cannot change anymore, it's not realistic to set your hope on that.
He will have to do what no other winger for us can do to keep his minutes up:
use his strong body, play with high work rate and high control at the same time. Those are his assets and he should focus exactly on that. We have seen how good and important he is when he does that. We have others to score.