Richard Vencu

This plugin creates and maintains one or multiple hierarchies of blogs in the WPMS network. Options screens appear in network admin dashboard. The blogs hierarchy can be used for several purposes such as:
<ol>
<li>consolidate posts (or latest posts) from descendant blogs only</li>
<li>display a list of descendant blogs or even a tree of blogs from any node</li>
</ol>
Other features
<ol>
<li>Hierarchy cannot loop (cannot set as parent one of the descendants or itself)</li>
<li>The main site (blog_id 1) cannot have a parent</li>
<li>Individual blogs may be taken out of hierarchy</li>
<li>Multiple independent hierarchies may be created 
Limitations: this plugin is not optimized for large installations. More than 50 blogs can be hard to manage.</li>
</ol>

Network Sites Hierarchy

This plugin creates and maintains one or multiple hierarchies of blogs in the WPMS network.

JS Morisset

The Most Comprehensive Schema BreadcrumbsList Markup of Any Plugin.
Adds Schema BreadcrumbList markup for posts, pages, custom post types, categories, tags, custom taxonomies, search results, and date archive pages.
Select between using ancestors (aka parents), the primary category, or all categories for posts, pages, and custom post types.
No Templates to Modify:
Simply activate or deactivate the plugin to enable / disable the addition of Schema BreadcrumbList markup.

<h3>WPSSO Core Required</h3>
WPSSO Schema Breadcrumbs Markup is an add-on for the <a href="https://wordpress.org/plugins/wpsso/" rel="ugc">WPSSO Core plugin</a>, which creates extensive and complete structured data to present your content at its best for social sites and search results – no matter how URLs are shared, reshared, messaged, posted, embedded, or crawled.

WPSSO Schema Breadcrumbs Markup

Schema BreadcrumbList markup in JSON-LD format for Google Rich Results.

Network Sites Hierarchy vs WPSSO Schema Breadcrumbs Markup