Richardson is a cool guess. He has elite straight-line speed and seemingly good hands. If Richardson breaks out, it would be difficult to name a deeper WR corps in the NFL today.
I do still worry about his slender frame and (long) injury history. During OTAs, he did not appear to have gained any significant muscle mass. I also do NOT view him as "explosive" when moving laterally. He has excellent straight-line speed but is more smooth than explosive while cutting. He is more like Kearse or Williams, in that way, than the explosive cutting ability and near seamless lateral movements of Lockett, Baldwin, or Smith.
Richardson has struggled to create separation, in part because I think he lacks that lateral explosiveness, and in part because he is still adjusting to playing the WR position at this level. Once he develops the savvy route running of Kearse, I think he is going to be a great weapon for us.
There could easily be a number of new weapons that arise on both sides of the ball because there are so many young first and second year players who appear to fit in well on paper: Vannett, Clark, Reed, Ifedi, Glowinski, Smith, Bryant, Jefferson, Hunt, Odhiambo, Poole, Collins, Madden, Prosise, Perkins, etc. etc. etc. Very hard for me to narrow it down to one because there are so many young guys with that kind of potential this season.
Maybe I will just go with Zac Brooks because he is probably the LEAST likely draftee to make the roster on paper, yet he has the kind of athletic profile to make a shocking splash in the preseason . . . if he gets the touches. Given the number of good RB prospects currently on the roster, that would be quite a surprise.