The title doesn’t match the content of the email. The email isn’t “begging for worse search results” rather they’re begging for more searches in the context of recent (at the time) Google Chrome changes that had reduced search volume.
It’s not clear what exactly that means, but search ranking seems more likely than a Chrome UI change.
Because I read more than random out of context tweets as my source of information.
> Is there another email that mentions Omnibox?
Yes. It's linked in multiple places in this very HN thread. Page 4 in the original justice.gov PDF specifically mentions the experiment that was done as a result of that originally quoted "complaint" email, and says "start experiments to improve search ranking in the omnibox".
The document actually requests a change in Chrome to make the search box more prominent, it's not about search results at all!
HN prefers titles that come from the article or submission itself. I'd suggest either tweet or email.