People are thinking about this the wrong way
The problem with overtime rules is not the format of a football game. While college changes the game in overtime, the pros do not and that is really a good thing. The problem with the pro system is that whoever gets the ball in overtime is based purely on blind luck. Possession is decided by a coin flip. I think if you want to fix the overtime in the NFL get ride of the coin flip and determine possession based on momentum and talent rather than luck. The ball should be placed on the 30 yard line, the spot of the kickoff, and each team elects a player to start at the other 30 yard line at one of the two hash marks. The ref would blow the whistle and the first player to get the ball gets the ball in overtime. This way if you lose in overtime its your own fault because you at least had a chance to win. I hope people give some thought to this kind of reform rather than this 'we both need to be on offense' mantra that I hear everyday.