Let's see what Mocking The Draft says about the pick:
Although the Broncos added Perrish Cox in the fifth round last year, his off-the-field problems are concerning. In addition, Andre Goodman was decent at best, and is the same age as Bailey. Syd'Quan Thompson is probably little more than a nickel cornerback.
Burton has the ability to be much more than that. He has good size, athleticism and instincts for the position. Being drafted to a team where he doesn't have to be the No. 1 guy immediately is exactly what he needs.
It never hurts to add corners. They're pass rushers -- you can't have enough of them. With Champ Bailey on the down hill side of his career, this makes sense.
For more on this pick, check out Mocking The Draft.