Cooper's form looks pretty decent to me. He'll probably never be a sniper but I think he'll be okay. I'll easily take the over on his .233 shooting from 3 and I'll take the over on his .696 from FT as well.
When it comes to efficiency I think the lower-hanging fruit is his shot selection. Per Torvik, he's attempted 37 close twos at a very good 68%. He's attempted 41 long twos at a 37% clip. I'd love to see him cut down a bit on the midrange shots and continue to refine his distribution when he draws help. When it comes to 3s, I'd prefer he mostly stick to open catch and shoot looks. Against Auburn I recall him taking a couple of contested, off the dribble 3s.