I think it should be sudden death after say 7:30 minutes or after each team has the ball which ever happens first. It's too easy for teams to drill 55 yard field goals these days and that's just chicken aMm IMO.
with nfl return games, you get the ball around the 30. with nfl kickers, 50 and in is damned near automatic. you have to make it to the 32 for a 50 yard field goal.
so all things being equal, you need a coin flip and 38 yards of offense to win the game with the other team never getting a shot. that's bullshit, imo.
personally, I like college's system. I know people bag on it when there are 6 or 7 OT games, but those games are some of the most exciting ever. Make the 2 point mandatory from the first OT, and let them play.