I wish we had a few extra picks so we could take a flier on Anunoby and/or Giles. If one of them hits you go back and wonder why teams ever went for the "safe" but low-ceiling option.
The problem is we just don't have access to the psychological info, important stuff like drive, work effort, intelligence. While not foolproof, it would go a long way in how comfortable you are in taking a project pick. Oh, and of course in-depth medicals.