Update: Corey was not impressive at all. I was able to watch ~75% of the game and I don't think he scored as I was watching. A number of turnovers when he did try to get aggressive (which wasn't as often as I would have preferred). Looked a little slow on D, but was dedicated in going for boards and did have a block (after his man beat him).
First time seeing him live, but the body language wasn't great either (hang dog situation) as his team was down pretty much the entire game and he wasn't playing well. Hopefully this is just a blip and only one game.
You can see why Duren is the #2 player though. Great combo of size/skill/athleticism. Got into early foul trouble so didn't play much in the first half. Not as dominant as you might expect but long term he definitely has the ability to be a productive pro.