He often played centrally for Villa and looked the part.
The time I recall him playing centrally often was when he was in the Championship and he was CAM and never a CM. So I take it that "often" means—when he was still in the trenches and was still in the Championship?
In the EPL, playing for Villa, Jack spent most of his time as a LW rather than CAM/LCM. Unless you’re counting all competitions and his time in the Championship and when he was 16-21yrs old, but as a more mature player, he’s mostly been a LW and this is in the EPL.
Adding to his CITY career, where he played almost always as a LW, his been a LW in the EPL(Villa+City) more than anything. His career has summed him up as LW.
CAM for CITY needs numbers G/A, vision and intelligence, all Pep CAM's in all Pep teams are phenomenal. Grealish does not offer that!
He doesn’t even have the attributes to be a traditional 8 in a Pep team, but at this point, he might as well play there. Even though he's slow in his decision-making, I doubt it could be worse than what we currently have. At least he's younger than Gundo and Kova and will put in the effort, unlike Gundo and Kova, who are a bit too slow