It is not everything, but it is something. When it comes to winning multiple games within the context of a College Football Playoff, having a better quarterback than what your opposition has going for it is never a bad thing. Of course, others factors are as important, if not more so, such as head coach, defensive line, and above all else, roster depth. The playoff is a beast now vs. the battle of attrition...
That being said, quarterback is still the most important position on the field within the context of most games. This is the player who touches the ball on seemingly every snap.