I'd definitely like to see him as a CM.
Look at the facts. He rarely loses the ball, which is a big plus at CM. Defensively he's pretty good too when he has to be. He is actually excellent at running with the ball when he's more central, he's great at shielding the ball when running in possession and can go past players once he gets moving.
I've always said Jack hasn't got great acceleration off the mark, but he can shift and keep the ball when he gets going. This to me is the big problem at LW, you only get 5 yards of space, and he doesn't trust his acceleration off the mark, so he's reluctant to try to beat his man on the outside. But you see when he has space to run into that he's very hard to get the ball off.
When you look at all his traits, you see why he pretty much had a free role at Villa. I think sticking him out so wide is really taking away a lot of his abilities.
Of course he will do a job out wide, sometimes a very good job because he's an intelligent player, but I'd like to see that Intelligence in a position that can utilise his abilities better.
But of course, Pep sees him every day and has forgotten more than us shitkickers on a forum will ever know about football, so I guess he has his reasons.
But I don't think it takes a football genius to realise the best traits of grealish aren't best utilised in such a confined area of the pitch.