That was junior. Like I said, you see it in EA Sports, but not in the NHL apart from the few exceptions to the rule.
Mainly because its really really really really hard.
The point stands that he had success there in junior, so it stands within reason that he should be tried there again at some point. He made (marginally) smarter plays, cut to the middle better, and had an easier time of finding angles for better shots.
It's kind of like Pettersson playing on the RW despite being left handed. Just works better for him.