In terms of need? It's a decent play. Burnett has a certain Darren Sharperish vibe to him. His ballhawk skills are strong and he can killshot a receiver going over the middle. But he does have the Darren Sharper tackling problem. And that means he does have a tendency to look real bad.
They lose a 4th round pick for this. And as such, they have to wait a long while for a cornerback. They need to hit a homer for this draft to work perfectly. Burnett gets a C because of price and the fact that he's like Mike Neal. A ton of upside, but a real reason to think he won't succeed.