There are some things in the NFL that are "broken". There are other things that are not.
Things that are broken include the overly complicated rules and the current inability to challenge some calls.
Some things that are not broken include the current scoring system, the current length of the season and the current amount of teams that make the playoffs.
Is the extra point boring? Perhaps, but who cares. You have the option to go for two or get the extra easy one. The one is an easy feather in the cap of the scoring team, its their little reward.