For Moncton, he plays in that role and they're 5th in the league in PP efficiency.
He's really good at distributing the puck and has a good passing game, with the vision to find the open man, yadda, yadda, yadda. He doesn't really have that big bomb of a point shot that some might look for in a defenseman on the powerplay, but he gets his shot off pretty quickly and it's accurate: six of his nine goals this year have come from the man advantage (worth noting that last year he scored nine over the entire season, with again six coming on the powerplay).
I also feel like he's shooting more than he was last year, but that might be just a byproduct of more playing time in those situations with Savard and Barberio gone.
But yeah, I would say he's more of a puck-mover than a triggerman. I'd be tempted to say he's more of a pass-first guy too, but his shot totals are up there as well for Moncton. I'm not abundantly familiar with OEL and what he brings, but if he's able to really tee it up, that could be quite a powerplay pairing for the Coyotes in the future.