Good think I am not a scout, I am color deficient. I can't tell my greens and purples well, some of those greens look like reds to me depending on the shade of light for me, lol
Thankfully, the traffic lights are a different shade of green.
Its hard to get a high quality DE outside of the first round. Has been my observation over the years, and corroborated by the stats posted above. Like QB, and LT, the traits simply have to be in the player. IMO, those are the three hardest positions to find (Raimann is an exception)
Like QB, when you are in a position to take one, you take one. Unless there is no DE worth it at 15 of course. A down year perhaps.