Why don't they have it work like the NBA.? If the score is tied at the end of four quarters, you play another quarter. If the score is still tied, play another, and so on, until you get a decision. Or if you think a quarter is too much, go for one-eighth (half a quarter).

Seems like a more balanced approach. The way it works now, it seems the team that wins the coin toss has a huge advantage. Do the numbers corroborate that?

I'm sure it must have worked this way at once, they must have had a reason to change it. Maybe the teams are too tired after four quarters of play, and that if you push it further they start getting injured a lot?

PS: Apparently the advantage is hot huge. I still think it would be a better game if the clock ruled overtime as it does the first four quarters. 

PPS: Jim Buzinski on SB Nation agrees.