Burnett was rated by PFF as a "Yellow" player for 2013 which equates to "Average NFL Starter." He had a down year for sure, but at the risk of being polarized or exaggerating my opinion (I don't think he's a real difference-maker) I don't think nearly as bad as you're depicting Red.

He made very few plays last year but "average starter" I think is a fairly accurate depiction of him. If the play of his running mate improves, and the style of the front 7 becomes more of a 1-gap penetrating rather than a 2-gap "keep 'em in front of you" style as I'm thinking it will, his play will likely improve too because he'll have more opportunities to make some plays. Some of them will fall right into his lap but he can make 'em if they come that way. If healthy, he's not a liability and that's not a bad thing for a safety to be if you got other guys making plays too.