The obvious answer is a "dominant" nose usually requires a double team, which opens up backers or other edge type rushers to help generate pressure. This helps the DB in coverage if the timing is off or things have to happen quicker in the pass game. I think probably opens up LBs to make plays in the run game as well when there is one less blocker. I assume this is the argument for that. I think you could argue a lock down CB could also be 1A, if it forces everything away from him in the pass game and the defense can rotate to the other side. I have tried to figure out if there truly is a "most important" position in a 3-3-5 or if it is just understanding the concepts meticulously as players and executing. How many big plays were given up by poor angles or late rotations that would've been nothing if not for player/coach miscue? I don't know. Perhaps the argument shouldn't be most important but instead more of a "it is a bonus to have" type thing. What are your thoughts?