The nice thing is that they've already plugged some holes.
Blackmon can return punts. I'm not sure about KO's, but they have less value. You return far more punts than KO's, especially with our defense. So, 1 WR that has vertical speed and can return kicks. We don't have to look for a larger one now, especially if Mathews progresses.
With all our mid round picks, we're set up well to get a good Center and probably Guard. We either have, or can sign, what worked for us for most of last year, so grabbing a decent Center in the draft is most likely an upgrade.
I hope we can get Williams to return for another year, but even so, we'd need depth there.
So, we've filled PR, RZ threat (and 3rd down conversion machine, mismatch, etc.), and CB. So we still need WR, CB depth, LG, C, and what else ? This is a terrible draft for Safety depth.