I agree with what your saying, it would be nice to add all the Blue Chip players we can. But what if Luck doesn't come back, or if he does and gets hurt again? A Blue Chip linebacker or whatever isn't as important as a highly talented QB. We've seen this season how woeful our offense is with a below average QB.
But if Luck does come back & stay healthy we can possibly use our pick/or Luck for multiple blue chippers, just a year later starting in 2019.