I have a feature request which might be a long shot but hopefully you can see how it might be useful.
Currently in WordPress SEO the "Page Analysis" feature (which is awesome) only looks at the_content from the main WP editor.
One site that I'm working on has multiple additional content sections created via Advanced Custom Fields which allows the developer to ensure that various page sections have proper HTML layout on the front end.
Would it be possible to make it so that WP SEO allows you to specify additional meta fields in its Page Analysis? Perhaps this could be as simple as an input box for a "Page Analysis Meta Fields" which would take a comma-separated list (in WPSEO > Titles & Metas > Post Types)?
Does it sound like something that could be useful functionality for the plugin?