Why no SCHEMA.ORG markup built in?

Why would you expect it automatically have it? I simply haven’t time to implement it, but this will come in a future version.

There is no point in adding schema.org support for the page that holds the main [wpsl] shortcode, since the results are dynamically generated by JS. So when Google visits the store locator page, it will only see the HTML structure of the store locator, but no store details since no search has been made yet.

It will make a difference on the single store pages ( domain.com/store/my-location ), but I have simply haven’t had time to implement it. Putting all my time in finishing work on the directory / statistics / category markers add-ons.