The only thing holding me back from a yes vote is the availability of detailed location data to 3rd parties. Can a mechanic sell this data? Can it be subpoenaed by police?
Do you mean because now some OnStar type API must be documented "for repair"? (if so, I'd argue that security through obscurity is little to no security at all and I'd hope that your API is properly secured. For example just because the Google email API is documented doesn't mean people suddenly can read my email!)