Never enough. EA needs to see how disappointed people are. If the game is that great, the number of positive post will out number the negative.
But, why do people tired of seeing these types of post continue to open them? That's my question.
Maybe because no one has it out for the game. People buy it in hopes that it is as improved as EA says it is. I doubt people are paying $50 just to come to OS and complain.
It took 5 minutes for me to realize I liked NCAA 2006. And that's after 2 years of not owning an EA game.
I don't think it takes a full day to form an opinion on a game, especially if one was hoping or expecting specific improvements. Once you see they're not there, you're going to be disappointed.