The NCAA overtime is exciting, but it penalizes the defenses. I'm all for playing football, not extra innings. If your defense has been playing well all day, keeping the other team from moving the ball downfield, why all of a sudden give them the ball in scoring territory?
I do like the idea of making sure each team gets at least one possesion, but let's play football. If the first team to get the ball fails to score, it's sudden death like normal. If the first team does score, the other team gets its chance, from the kickoff like normal.
This would, perhaps, keep coaches from playing for the "sure thing" OT field goal, knowing the other team would have a chance. And it wouldn't penalize the defense. In fact, you would see some games ending on desperation 4th down plays, much like in college.
SD