I'm guessing you aren't a gamer.
I can tell you that as a gamer, we have very, *very*, different views on how to rate a game.
When I look at what games to buy, I consider the following:
Quality of controls
And none of those were on your list.
Why not leave the grading of games to those who actually enjoy the games? Or at least those who play them? I sure as hell don't wander into the competitive sailing scene and start demanding they rate their boats on how much they look like penises when squinting. Why do the same to games?