3-Safety Personnel?

[*ochocincos*]

We've heard that Austin wants to run some 3-safety looks (often?) and believe that was a big reason for why a guy like Jessie Bates III was taken.

What exactly would those 3-safety looks look like? From everything I've understood about 3-safety looks, it's essentially replacing a LB for another safety.

I would think in 4-2-5, it'd be....
CBs = WJ3, Kirkpatrick
Safeties = Iloka, Williams, Bates
LBs = Burfict, Brown

And I would think in 4-1-6, it'd be...
CBs = Add Dennard
LBs = Remove Brown

And I think in these looks, Austin would have Williams more in the box and Bates as a true cover guy.