Burke's D was simple but effective. He relied on man coverage which allowed him to use creative pressure packages. His DBs were always well - coached on how to cover one on one effectively.
Just for the record - the nipples of any male mammal are part of what determines what kind of nipples their female offspring will have. So, you're basically saying Burke was not completely useless.
QB pressure is almost always mentioned as being the key to victory. However, if a D is giving up too much in coverage in order to generate pressure, that spells trouble.