The way I look at it is, 10 days ago Miami fans were so unhappy and unsure of the receiving corp that they said the Dolphins needed to add one of the top 3 wrs in the draft and maybe another wr as well. They added Waddle, but one player shouldn't take you from a position of concern to the top unit in the league.
I do believe Miami has a very good wr corp if everyone stays healthy, I'm not sure I would say the best in the league. In fact they don't all have to be healthy, just have 5 of the 6 be available on game day and the Dolphins will be in good shape. They just can't have 2 or 3 of the top 4 wrs all out at the same time.