Yeah I've always wanted to see him start coming in to the middle of the pitch a bit more rather than standing right on the touch line. I mentioned earlier in this thread last week that he's actually really good at going past players when he has a bit more room in the center of the pitch and glides past them because he can get moving a bit, he's not slow once he gets going, but I don't think he's got super quick acceleration, which is why when he has a very narrow space to work in very wide on the left, he doesn't often try to beat the man down the line.
When he comes in the middle a bit and can run facing goal, he goes past players and also picks out some nice passes. There was a few passes in the first half yesterday where his vision looked outstanding, but he doesn't get much opportunity to do that when he is right on the touchline and either has an option of going down the line or cutting back inside.
I've always said to get the best out of grealish and to see his true quality, you can't restrict him to a very small area of the pitch. Obviously when necessary he will do a good job there and he's good defensively too, but in terms of attack, he needs to able to roam a bit, obviously with some discipline and shape still.