They more replace Stevie with Mike Williams than they did Watkins. I would have kept Johnson around, as I thought his "antics" were way overstated and over blown. He never really got in trouble and was pretty darn good at getting open. Whereas Williams, who also has always put good numbers, is one mistake away from a long call from the Commish (unless he just beats up a woman, but I digress). I would also not put him as better than Moulds was so I would not got as far as the best WR since Reed.
As for Watkins he is the farthest thing from a prima donna. He really seems to have his head on straight and is very humble.
Be careful with Mike Williams. Kid has had his fair share of issues at Syracuse and while in the league. Sammy is a phenomenal talent, and he is not a prima donna typical WR.
Your Bills cost the Dolphins and this is a team Miami needs to figure out. Well, let's be real, the OL play needs to improve to deal with a very talented Bills DL. That is the biggest key.