You're correct. The game did launch at $50. I'll correct that in the text. Still, it is essentially a full-priced game, which is why I took issue with it as a value proposition.
I personally think that price is a factor in reviwing games, as you could just sell a game for $400 under that pretense. I think there has to be a gradation in expectation, to some extent, when price is concerned, especially when it comes to sports games. Users are often looking for gameplay and value, and price has an impact on what you might get in that regard.
That said, even a $5 game can still be reviewed properly within its own limits, as it could provide gameplay and depth of a high quality, even for its lesser asking price.