Yea. I think for the public rating ranking should be decided in one of the following way.
Method 1: Select From 20 Top Most Rated
From Top 20 most rated game. Pick the one with highest rating.
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Method 2: Power Rate count
When rate count increases. That mean the result is more trustable and accurate. But doesn't mean the game is better.
Therefore, this formula only using rate count amplifies the result.
Final score = {score / 5 +0.5} ^(1+ (rate count/100))
Case A: 5 stars rated with total 9 ratings.
Final score = (1.5)^(1.09) = 1.556
Case B: 5 stars rated with total 90 ratings
Final score = (1.5)^(1.9) = 2.16
Case C: 2.3 stars rated with total 200 ratings
Final score = (2.3/5 +0.5)^(3) = 0.884
And you can see,
The winner is the 5 stars game with 90 rating.
Which is pretty Fair to me.