He is fast, and has a good shot, but his playmaking and vision in the offensive zone aren't good at all. He skates himself into trouble all the time, and his hands aren't nearly good enough to get him more space. His release can also be a bit slow, as well.
That said, while I would be slightly disappointed if we get Cozens, I can still see him panning out as a top-6 winger. He's a right shot, which would work well on the pp. But at #8, we can do quite a bit better.
I would definitely prefer Cozens over Broberg and Podkolzin.