On to the rankings. As always, if you're unfamiliar with these posts, check out the introduction here.
The show had plot holes and characters acting stupidly (or doing seemingly dumb things simply to add to the dramatic tension). This show would set up plot points but then resolve them too soon and with too few of consequences. Almost everything involving the kids fell flat.
However, this show had potential. For the most part it was about people with powers who actually enjoyed using them. And while the kid stuff was pretty lame, I saw the intent. If they did it right it definitely could have had a Buffy the Vampire Slayer feel to it with the extraordinary challenges the teens face being symbolic of the more mundane, every day challenges real teens face. This show was also setting up a greater mythology without going so deep into the mysteries and foreshadowing that they boxed themselves.
Long story short, I felt the show had potential and would have loved to have seen it try and find itself in its second season. But, at the same time, I'm not really surprised it got cancelled and can't blame the networks for doing so.