It's not so much the notion of aggregating variables between games compared to review scores, it's more the fact that you know someone is going to be making games based on it.
It's the same problem that you get with targeted advertising, using Facebook and Google data. All they can show you is what you already like, and what you already know. They rarely ever challenge you by showing you something new.
There's no such thing as a zero sum individual, so basing your advertising on that is always going to be flawed.
For someone to apply those models to a creative medium, is absolutely terrifying to me.
We obviously have more developers coming out and practically admitting to metrics, statistics and focus group data driving their design decisions - Codemasters disappointed me pretty heavily by doing that - but I sure as hell hope that this is just a fad.
At some point the industry has to realize that it stands and falls with the breadth of its creative vision, no?
It really gets scarier when you consider the fact that those reviews are scored by people who see themselves as quality testers, rather than critics. Yikes.