What's been most fascinating to watch IMO is the interesting catch-22 of having a short reach due to size.
While he amazingly makes more poke checks and takeaway plays than someone of his size ought, there are still many times when the reach of a larger player ahead of him is simply too great to make a play on. While he was flailing away a lot at the start of the season, he has pretty much come to terms with the fact that sometimes he's at a disadvantage and lets someone else take care of that and positions himself for a future pass instead.
That small reach becomes an advantage close in though, when the smaller radius of his puck handling due to size + skill is simply so much faster than most larger players. He not only can think at a high level, but his size means he can literally beat even skilled larger players out more often than not close in.
The plays where he sucks larger players in close to him and out of position and then beats them with a quick pass to the location where they ought to be is where JG is going to earn his payouts.
He's still learning too... over the last few games he's started hanging out often behind the net, and has realized that he has a huge advantage there. I suspect he will make further discoveries about the advantages of being small and take his game to another level.