For those concerned that Pioli didn't do enough for CB depth... look at some of the other defenses' 4th-6th CBs:

Patriots: Sterling Moore, Marquice Cole

Packers: Brendian Ross, Casey Hayward

49ers: Chris Culliver, Tramaine Brock

Ravens: Asa Jackson, Chykie Brown

PLEASE let me know who on that list is super impressive, because I haven’t heard of most of them

Defenses struggle when the bottom-of-the depth chart DBs face Pro Bowl-Calibur WRs... I would go so far as to say those teams would struggle if they were missing 2 starters in their Defensive backfields, and were starting the names above.