Bengals FA Plan - What was it, was it good?

[fredtoast]

I understand that some DBs can play could coverage but have problems pressing the receivers at the LOS. So I can see why a "zone DB" might have problems in press man coverage. But I can't think of a single skill set involving coverage that would cause a "man-to-man DB" to struggle in zone.

So what skill would a good "man-to-man CB" be lacking that would cause him to struggle in a zone scheme?