The mechanistic insistence on original titles often gets things wrong, leaving a title in place that "buries the lede" (the actually new nugget in a particular story) or includes its own misleading spin. People then either miss or waste time on stories, when a few reasonable extra words in the title would have helped.
Possible experiments to address this might include:
• Adding a separately-voted 'title tournament' for each story, in which the original title, submission title, and others audience-submitted compete. (They're not competing for which gets the story the most upvotes, but which best describes the item.)
• Allowing a subhead per story, where either the original subhead or some other pull-up excerpt can appear for context. (This could be from the OP, admins, a group tournament, or even just wiki-style.)
The file from January 2013 appears just as permissive:
http://web.archive.org/web/20130109093744/http://news.ycombi...
https://news.ycombinator.com/robots.txt
shows no such thing...
User-Agent: *
Disallow: /x?
Disallow: /vote?
Disallow: /reply?
Disallow: /submitted?
Disallow: /submitlink?
Disallow: /threads?
Crawl-delay: 30
Links in comments are marked nofollow but submissions are not.