Yes, the sudden-death overtime rule in the NFL is a good one, because it makes the NFL very exciting. The NFL sets up overtime to be extremely exciting for those who are lucky enough to attend or watch a game that goes into overtime. The NFL sets up teams to take risks in overtime in order to win.
Sudden-death overtime in the NFL is a good rule because anything can happen. The NHL has sudden-death overtime, so why not football? Whoever wins the coin toss to receive the ball doesn't affect the majority of outcomes in overtime games. Instead of a coin toss, there must be some other method to determine who gets the ball first to decide the winner during extra time.