Season 2 failed, for the following reasons:
-Claire was made into a complete idiot. She already knew HRG did some bad things in the past when Ted held her and her family hostage in
Company Man. She had already come to terms with it and forgave him at the end of the first season. Then she meets a boy who just happened to be someone her father had abducted when he worked for The Company, something she already knew, and all of sudden she take sit personal? Bad writing for the win!
-Peter was similarly ripped of any shred of intellect. His amnesia storyline was 31 different flavors of suck. That whole mystery with the box was supremely rediculous. All the big mystery for a passport (which listed his gender as Female) and a few credit cards and stuff? Not only that, but he has the power to read minds, yet he couldn't read Adam's mind to know he was up to no good? And everyone was telling him so?
-Sylar should've stayed dead.
-Angela and Kaito's powers were never revealed. They kept making a big deal out of The Company and talked about how all their secrets would be let out of the bag and they could've really opened some doors with this one. Kaito was killed before we could find out, thus leaving a major plot hole forever ajar. Angela still has time to redeem this issue somewhat.
-Mya and Alejandro are incredibly useless and annoying.
-Hiro should've stayed in Japan for at most 4 episodes.
-The character interaction that made last season work so well and the connections they had with each other by the end of last season's finale was completely ignored this season, as was the show's initial draw (Ordinary People With Extraordinary Abilities).
-Suresh became a flip flopping idiot and is the saddest excuse for an intellectual type ever put onscreen.
-D.L.'s death was pathetic.
-Nathan was wasted, both figuratively and literally.
The saving graces this season were HRG, Matt and Elle (and to an extent Bob). HRG is the reason I watch. Every episode shows him growing in depth and badassery. He's officially replaced Sarah Connor and Jack Bauer as World's Coolest Fictional Parent. Matt really developed as a character this season. We saw sides of him we never saw before and the scene where he confronts his father was awesome. And Elle is so entertaining and unpredictable. She provides a sense of black humor for the show. Also Kristen Bell is hot.
That being said, I have faith the next season will completely redeem the show. By all accounts, Tim Kring seems to know where he went wrong and is intent on bringing his A game to ensure everything goes right for Season 3.
Wow, what an amazing, well constructed argument.