Man, this is embarrassing.
I'm all for cleaning up the standards, journalistic and ethical, of video game publications and sites, but this attempt to adjust the score of a single game is not the answer. And let's all be honest with ourselves: the petitioner is upset his favorite game got knocked down a peg. This isn't about getting things right. It's about a low-ball score for a PlayStation exclusive. After all, the author can only justify a score as low as 8, and he wants to respect the developers for their "time and money." He definitely seems more pre-occupied with the "flawless reputation of the game" than he does any kind of truth-seeking.
Aggregate sites like Metacritic and video game journalism in general are flawed, yes, but so are consumer expectations. We fight tooth and nail to secure the best coverage for OUR games, but leave "rival" games in the dust. We champion freedom of expression, as long as it means high scores. And we refuse to allow critics to use a full rating scale. WE are part of the Metacritic problem, and petitions like this show why.