gavleson

This seems more of a problem with your theme, than the plugin. But with that being said, you could edit your theme’s CSS. Go to Appearance > Editor and add —

.wp-polls-ul > li > strong > i > small {
    font-size: 1em;
}

— or whatever size you want. That should do it. Or increase all the text in the poll with this CSS:

.wp-polls {
	font-size: 1.1em;
}

You could probably also add styles directly to the poll template found in Polls > Poll Templates, or simply remove the <small>-tag there.

I finally figured it out myself…

1. Create a child theme
2. In the child theme, edit /template-parts/content.php on line 26 to replace
   <?php the_excerpt(); ?>

   with

   <?php 
   	if( strpos( $post->post_content, '<!--more-->' ) ) { 
   		the_content();
   	} else { 
   		the_excerpt(); 
   	}
   ?>

3. In the child theme, add the following code to functions.php:

   // override parent theme's 'read more' for excerpts
   function child_theme_setup() {
   	remove_filter( 'excerpt_more', 'treville_excerpt_more' ); 
   }
   add_action( 'after_setup_theme', 'child_theme_setup' );
   
   // use custom 'read more' link on excerpts
   function new_excerpt_more($more) { 
   	global $post;
   	return '<a class="moretag" href="'. get_permalink() . '">[Read more]</a>';
   }
   add_filter('excerpt_more', 'new_excerpt_more');
   
   // add a 'read more' link to hand-crafted excerpts 
   function manual_excerpt_more( $excerpt ) {
   	$excerpt_more = '';
   	if( has_excerpt() || $has_teaser == true) {
   		$excerpt_more = '&nbsp;<a href="' . get_permalink() . '" rel="nofollow">[Read more]</a>';
   	}
   	return $excerpt . $excerpt_more;
   }
   add_filter( 'get_the_excerpt', 'manual_excerpt_more' );
   
   // use custom 'read more' link on posts with <!--more--> tag
   function new_read_more_link() { 
   	return '<a class="more-link" href="' . get_permalink() . '">[Read more]</a>';
   }
   add_filter( 'the_content_more_link', 'new_read_more_link');

Edit CSS and classes to fit your wish.