I've also thought about the continued effectiveness of the 3-4 in a game that gives every break imaginable to the QB & receivers. However, if your defense can rush 2 explosive, strong & fast OLBs, then a 3-4 defense can still be effective, perhaps superior, to the 4-3. We don't have those 2 OLBs, however...obviously.
Back to topic: if our CBs as of today consisted of -
Hobbs............................Wheatley
................Webster.....................
Bryant............................O'Neal
and our Safeties consisted of -
Harrison..........................Meriweather
.................JSanders.......................
TWilliams.........................LSanders
then that would be an acceptable - not outstanding - DBackfield. However, because of the injuries to Wheatley (big surprise), Rodney (another shock) & Tank (3 for 3), your depth/drafting acumen becomes tested. But when your answers are Richardson, Wilhite & Matt Slater, you've failed the test. Bubba & Spann = Incomplete; has Bubba taken any snaps at S, and can Spann play Big CB at all?