Please more support for the IPTC Headline tag!

Question

The use of the IPTC Headline tag (as opposed to the Title tag) is being discussed in posts back to 2007.
Basically it's weird that Lightroom supports the Title tag with filters and search function whereas the Headline tag sees none of that treatment.
Per definition the Headline tag
"... is a brief, publishable synopsis or summary of the contents of the photograph. Like a news story's lead, the Headline should grab attention and summarize the image's content. Headlines must be succinct. Leave any supporting narrative for the Description field. Do not, however, confuse the Headline term with Title."
whereas the Title tag
"... can include a shorthand reference for the image or “photograph” - primarily for identification. The title of an image should be a short, human-readable name - text and/or numeric reference - and may take several forms. For photographers, this might be the filename of their original scan or digital camera file. For news organizations it might be the name of a story it accompanies. The Title term should not be confused with the Headline term, which is a short synopsis of the photograph's content."
These definitions should make it fairly clear that the Headline tag needs at least the same tools treatment as the Title tag has.

Answer 1

Submit a feature request to:
http://feedback.photoshop.com/