I might be wrong, but I was under the impression he's always loved getting a 3rd safety/cover man on the field like Donovan WIlson when he was at LSU.
EDIT: Also, I have no doubt that 8 is still short of the total we want on the team even if we will tend to play a lot of 2 LB packages with perfect personnel. I am genuinely curious how many total LB's he normally has.