We're looking to have more options for the Subheading field in Composer settings.
One of the options is to make the field required when publishing new content. It can also serve as a friendly reminder that the editor may have forgotten to fill out this field for whatever reason.
The other option is to add a character limit to the subheading. While I don't think it's as important to search results like the main headline is, sometimes too much information can be placed in this field, rather than down in the body copy.
Similar to all settings, these should be set at the organization level to not disrupt any current workflows of websites.