Buckner is overrated. He had 10.5 sacks against marginal college teams. Jernigan is a much better pass rusher. And last I checked, the draft is not over - Myles Jack, Noah Spence, Ogbah, Dodd all still on the board - all as good as or better PR than Buckner.
Yeah, I don't get it. Buckner is a 5-tech DE, which in the Ravens scheme is a run-stopping position. The rush is designed to come from the Leo (Suggs), 3-tech (Jernigan), and Sam (Doom) positions. In fact, for those clamoring that the Ravens needed an "impact play maker" at 6, I'd argue that Buckner's position is the least impactful one in the front 7. Drafting him that high would be like taking an OG with the 6th pick. Considering how some feel about taking an LT with the pick I find this "we should've taken Buckner" talk quite silly.