It wouldn't surprise me if Len and Olynyk are bust. In some situations, like in the open court, Len's not slow or unathletic but his moves and decisionmaking in the post come at a glacial pace. He's one of the worst bigs against double-teams I've seen in college. Olynyk has the potential to be a big whose offense isn't good enough to make up for his bad defense and rebounding. It's laughable that his agent is trying to sell him as a small forward. Good grief.
I think Porter's pretty safe, with a solid floor. He's just too well-rounded and smart on the court to bust. He and Green were similar players in college but Green turned out to be nothing like he was projected. I can't imagine anyone projected Green would go from being a multi-dimensional threat to just basically a scorer and solid individual defender whose playmaking is just so-so and whose rebounding is atrocious.