Groh is not the problem. We do not have the talent. 2 DC's same results should tell you that
If we don't have the talent, why would we convert to a defense that arguably requires even more specialized talent to run?
Besides, we were doing pretty well defensively up until Wommack and Groh
Sure, we'd have two or three ****-your-pants type games, but we could actually dominate the mediocre teams