I’m glad to hear you’re enjoying the theme. 🙂
Regarding your question about HTML in the site description: the reason this isn’t made possible is that WordPress (and many SEO plugins) add the Site Description to the title of the page and/or insert it into META tags. If there was HTML in the site description, it would first need to be stripped out before going into the site title, etc., and that’s just not something those other plugins do.
If you want to override this functionality in a child theme, you should be able to change any references to
get_bloginfo('description'); in the code to
echo html_entity_decode(get_bloginfo('description')); and that will parse any HTML you’ve added to the site description. If you need help doing this, please see the WordPress Support forum.