Provide more metadata in Search API results

I am using the Search API for a project, and it is working well for the most part. However, the excerpts that it returns are not especially useful, as it will combine headings and body sections into a single string which becomes pretty indecipherable.

Could we add some more metadata to the raw data results? If I had access to things like the description and twitter image url, I would find the API a lot more useful.