Jim Rome mocked this yesterday and said, "why not have whoever scores be the person that has to make the kick, Tom Brady scored a few weeks ago lets make him kick, that should make it not boring"
In my view if it isn't broke why fix it, NFL has the highest ratings of any sport. I've never heard anyone say the extra point is why they don't watch the game. It's like having a hot girl friend/wife and you complain that maybe it would be better if..... we all know where that leads!