Lookit... if we draft Desmond King, I'm going to be too excited about this draft to type.
Seriously, the cost of moving up in the 4th is minimal compared to the first 3 rounds. If they like King (or anyone) that much, it wouldn't take a whole lot to go up and get him.
King has the demeanor, ball skills, competitiveness and toughness that the team is searching for. He can play S or CB and would be a much, much better player than Blanton IMO. I don't think there's anything wrong with Blanton... but King is really a nice player. Really, really nice (been a fav of mine this whole pre draft process).