This is no doubt one of the most widely used modules for the SEO stuffs and WP users are heavily dependent on it for complete SEO. But at certain point we need to output custom meta tags and felt the necessity for another plugins to do that like meta tag manager. Installing another plugins for small small things will be a performance overhead specially for general sites on shared server. So, it will be nice if this module have the capability to add custom meta tags since metas are SEO stuffs.
Just a feature suggestion.