Clearly the Pats have had much better luck poaching NFL WRs (Moss, Welker, Amendola ) than drafting (Branch, Edleman are the only ones who didn't suck that come to mind). That being said, the Harry and Thorton misses really hurt, as better WR were passed over for these busts.
Hopkins is getting older and has been hurt, and I doubt he wants to play under BoB, so I would rule him out. Michael Thomas is a UFA, but he too is over 30 and I don't think he has played in a couple of years due to injury.
D.J. Chark's contract voids on 2/10, so the Lions are going to have fish or cut bait with him before then. I wouldn't mind the Pats going after him. Other UFAs JuJu is still only 27 and Mercole Hartman can fly. Maybe a JuJu Junno route combination!