You succeeded once again in making a season that started out with potential to wow and amaze with new "twists" and turns, so many that you ran up your own a**, didn't know where to go, and s*** yourself to death.
You call that a final episode? What were the stakes? What was the real danger? Give people abilities. Ok, then what? the world ends. how? What was the threat throughout this entire series? Arther was not an intimidating villain in any sense. Nathan and Peter are still weak individuals, and the cheerleader, the most annoying character in the realm of superheroes, is still alive and whining. And then you go and kill the only interesting and strong character (Sylar) while the rest of the cast live.
And at the end of the finale, can anybody say X-men's Mutant Registration Program? Come on now. Have an original idea. This show overran it's course. ABC, you suck.