How many starters do you expect to get from the draft? Currently Miami grabbed 3 current starters (Satele, Ginn, and Fields) with 2 possible starters (Solai and Beck) and one player that could have been a decent contributer in Cam's system (Booker). So, 30 percent of the players drafted by Cam and Randy are starters. Bill Polian, who is widely considered one of the best GMs around largely due to his drafting prowess, averages 11.3% of his picks becoming starters. Polian also mentioned in an article I read, sorry I can't find the quote, that a successful draft would net 2 to 3 starters. Hate Cam and Randy for what you will, but second guessing their draft strategy is somewhat frutiless.
Keep in mind that a bunch of other teams passed on Brady. He hasn't seen the field, so we really don't know how good he is. How many players have looked good in practice only to fall flat on their face with the lights come on? As of yet Brady has not proved to be a good or bad draft pick, just one that made the team.
Yes, hindsight is 20/20 and if you had to do the draft all over again Adrian Peterson would be the first pick in the draft, but to say the Dolphins' draft sucked is down right stupid.
Article with Polian's draft percentage (3rd paragraph):
http://nbcsports.msnbc.com/id/24283288/site/21683474/