Yea I mean I don't think just the draft is going to transform our 2017 pass rush either, that's why I'd take a long look at a guy like Melvin Ingram if we want to take advantage of this window where Prescott is on a rookie deal.
To me it's more about consistently accumulating talent and eventually you'll look up in 2019 or 2020 and we'll have a legitimate pass rush to go along with a 25-26 year old QB, elite 24 year old RB and several elite OL who are still in their prime at about 29-30. You have to start somewhere and even a few good but not elite, 8 sack types like Bruce Irvin or Everson Griffen could be the difference between a Super Bowl appearance or not in the next 3-5 years.
I know what you're saying about what is more or less a market inefficiency where certain positions are over drafted and you can find better talent at more overlooked positions late in the 1st, but that's on a case by case basis. The strength of this year's DE class at the top makes it a bit different because I think a guy like Harris could be a top 20 or so talent, but he could easily be pushed down to the end of the 1st/early 2nd.