I can't explain why Cooper hasn't really done anything in Arizona or how much injuries might have to do with it, but these clips show a guy who is extremely athletic and quick. He sets up quick, he gets into position quick and he gets to the second level about as fast as anybody you will see.
He's got outstanding body control and is excellent at cutting guys when on the move. He slides and mirrors easily in pass pro and seems to have good awareness of when to switch off and it is clear that UNC liked to design plays to use Cooper's ability to pull and move.
On the down side, I'd venture to say that he doesn't really explode into and crush guys and isn't the best finisher. He's seems content to neutralize a guy rather than root him out and dominate. Not nasty, more of a "fudgehammer". He's a bit casual and sometimes plays like he's just cruising on superior ability. His size is probably a bit below average. He can get grabby at times when a guy is sliding off his block.
Maybe he expected to dominate in the pros and doesn't have the fire in his belly to get better and stronger, but I find it hard to understand why he can't be a superior pro with those all-around movement skills.
It's probably because of John Hannah, but I get fascinated with athletic OLs like Cooper and I sincerely hope that Dante can shape him into the kind of player that so many pro scouts saw prior to the draft.