I hear you. Still, that's why guys like Boldin, who played against top competition, last until pick 54. I'm not advocating for doing away with the 40, but just think tape should be the golden standard regardless.
Re: Williams, the reason he won match-ups frequently, from my understanding, is that he wins 50-50 balls, not because of his speed. Totally agree teams don't want unanswered questions, but can't-miss prospects are few and far between.