I like your take on it and I agree with your thinking. I do wonder if someone is dropping by your game and rating it, as you say for example, "good job" - how much time did they actually spend looking at it and thinking about it? Because ultimately that turns into a rating. And it's probably going to be somewhere around 3 for everything because they are not invested in it. For me I want to look at all those categories at the end of the day, and relative to everyone else, be able to gage more or less how well I'm doing, and thats difficult to do if I got 15 "good job" ratings with a 3 star average (and everyone else did too), instead of 15 serious ratings with 1/2 star for my weak areas, 4/5 star for my strong areas. It helps you figure out where you can focus on improving, in addition to the areas where you have strength and can focus more on in your next game.