If a coach with the background of Sanders was to come in as DC, one can bet that he runs the defense as he sees fit. A lot of Coach Sanders strength is in the front wall, DT's, DE's and LB's.
There are times when zone is the right call, but it has to be the RIGHT call. Circumstances and field position dictate what to expect from the D.
ugaa is right again. BVG knew that he had what it takes to make the folks on defense successful. Left, stayed a short time with South Carolina, that was quickly over when the Falcons came calling. Falcons (Smith) knew that BVG understood schemes and PERSONNEL.