The bigger question is: why do you think that there is some kind of pure, objective ranking of websites that Google is now tampering with? Do you think that someone whose IP is located in Utah should get the same result for "good hamburgers late night" as someone in New York? If someone from Vietnam searches for "Vietnam War"...should they be sent to the entry at vi.wikipedia.org because it's in Vietnamese and perhaps more relevant to the Vietnam user? Or to en.wikipedia.org's version, because besides having a shitton more inbound links, it's likely to have also many, many more eyes and editors on it? These are complicated things that we don't need a review of source code to debate. But your suspicions toward them seems to be based off of a worldview in which there is One True Web for everyone, which seems as problematic as the mindset that surely Google can do no evil.
Given that Google uses personal data to shape the web its users see...isn't it even more relevant to see the data they collect? AFAIK, Google still allows us to download virtually every bit of data we've explicitly generated on its services, including all the emails and search requests we've conducted.