Currently the NCAA overtime period works like this: both teams get a possession starting from their opponent's 25-yard line. No matter what, each team gets a chance to score. If the score is still tied after the first overtime, the teams swap whichever was on offense and defense in the first period. If the game goes longer than two overtimes, starting in the third period you must attempt a two-point conversion after scoring a touchdown.The rules favor offense over defense, starting on the 25 yard line negates the defense's ability to have an impact. Special teams performance is also largely eliminated.
I have two simple suggestions, (1) at each overtime period move the starting point back 5 yards and (2) require the team on offense to kick a punt or a field goal at the end of their possession and give the opponent choice of starting points.
I wouldn't object to starting at the 35 yard line in the first overtime.