There are three OHL D-man who are tearing it up offensively as ES, Bonk is in the next group of 3, with Dickinson. He's not going to be a dominant ES play driver in the NHL, but the PP may not be a fluke. He got drafted in the 1st rd, at least off scouting reports, based on a high IQ, defensively responsible and a good skater who should fill out his 6'2 176 lb frame. The offense this season is a surprise, and his surge post-WJC may simply reflect the confidence from performing on the big stage.
Given how strong he's finishing his D+1 season, I suspect if he continues to fill out this summer and shows he can hold his own in TC, he's not going back to the CHL next season. Same holds with Barkey, but in his case he's so small they may want him to return until he fills out to 175 lbs or so, 155 lbs ain't gonna cut it in the NHL without elite jets, and he doesn't have them.