McConkey is exactly the kind of WR Belichick preferred throughout his whole career, short area shuttle, specifically went out of his way looking for that, sometimes to his detriment. It worked with Branch who had an incredible shuttle, but failed with Chad Jackson who had the top shuttle in the NFL that year.
Drafting a DT here BTW would not have been a bad idea since Braden Fiske, T'Vondre Sweat, Jerzhan Newton would have been homerun picks right there, and don't be surprised if we use our top 1st rounder on a DT this draft.
As for CBs, no way would he have gone that route, not after already having a foursome of Gonzalez, Marcus Jones, Alex Austin (who played well in the 2nd half of last year), and Jon Jones.
Maybe Cooper DeJean, since this team definitely needs a free safety.
But again, we're talking about WR. McConkey is a prototype WR that screams Patriots under Belichick, he's in the Troy Brown, Deion Branch, Wes Welker, Julian Edelman, Danny Amendola mode.