I'd like to suggest you to add the possibility of showing the image excerpt in the article view (just like it is in the joomla counterpart)
If you add this at functions.php
function get_post_thumbnail_caption() {
if ( $thumb = get_post_thumbnail_id() )
return get_post( $thumb )->post_excerpt;
}
and call this function at content.post.featured.php
<figure class="featured-image">
<?php the_post_thumbnail(); ?>
<span class="itemImageCaption">
<?php echo wpautop( get_post_thumbnail_caption() ); ?>
</span>
</figure>
It would be nice than, for the Pin button, getting the excerpt of the image, and not the title of the article.
You can see my implementation in this example http://www.albanianews.it/cultura/donna ... arco-tempo