I'll try not to belabor it because you and bland already seemed to settle it between you two, but it's his skillset and style of play where he would benefit the powerplay. If anything, I don't see a problem with trying.
It's at least showing some more creativity than throwing the same 5 vets out there. It's at least a step in the right direction. I just think, especially with a significantly smaller sample size, it's not fair to compare his play on PLD's line with others.
He was also a rookie. I know you acknowledge the potential, but this is a third-rounder who went from NCAA to NHL in a five-month span. And the most important thing for a role player is experience, which is why I didn't think he'd benefit a whole lot playing in the AHL. Someone like Lizotte didn't need the AHL either. He just had one game in the minors.
Now, personally, I think Turcotte would be a better fit on the powerplay, as his style seems closer to Iafallo. But I don't think getting a decent checker to retrieve pucks on the powerplay is an indication they struggle with sorting out roles. Laferriere is, currently, the player whose deployment and developmental arc best reflects my general philosophy of how the org should be doing things. Maybe I'm biased though.