Except some of our worst turns have come by DB's flying in with crappy technique. They look like Naruto coming in for armless tackles and it can be seen as far back as the Minny Miracle. That says basics aren't required or stressed.
Williams was a rookie and got caught thinking about not committing a penalty instead of just playing. The same guy went on to be good enough at Safety that we couldn't afford to keep him.
Overall, we have had very good coverage while DA was coach. Even while having some terrible pass rushers.