I just watching the latest episode of Heroes when it came to me why it is different. My sister had mentioned that the new “rebooted” season is somehow different from the previous season. That was the season when there was so much lovey-dovey going on and everything was shiny and happy (Sylar was goody-goody, wth!!!).
After the reboot, I realized that the series has made a twist to the dark: people are dying, things are turned upsaide down, everything seems bleak and hopeless, and Sylar is oozing pure evil. Much better, definitely much better.