I think the Buchanan point is a very, very good one. Right now Buchanan has 2 years left on his rookie deal and has done absolutely nothing in his first 2 years. I think he's a completely unknown quantity. He could break out and be a really good rotational player, or he could be closer to Jake Bequette. He certainly has the length and measurables, which were always intriguing, especially his 6.91 3-cone. I don't think you can look at Valles' measurables and say that he will be better than Buchanan. But I have a sense from his tape that he will be. Maybe it's just wishful thinking. But he seems much more comfortable on the line than Buchanan. His combat technique is raw, but he's willing.
As for exposing sophomores, I'm not so sure. I think it would depend on the individual evaluation of the player and his ability to grasp schemes and adapt more than his college experience level. But I agree that that would be a factor to check out very carefully.