They have very little depth at the [CB] position and Brandon McDonald is better as a nickelback anyway. They need a good corner opposite Eric Wright. If they use the best available strategy again this year, Joe Haden could very well be their pick at 7.They really needed to go with someone who can help them right away and Haden, because of their depth at cornerback, will probably not start until year 3.
they did draft a cornerback in the first with really good upside
They also traded for Sheldon Brown who has at least 2 years left of starting at CB. That's why I don't think Haden sees much of the field until year 3.