Not sure it's User Essentials or would fit better elsewhere, but could we have an option to filter a user's content in their "Postings" tab by total number of reactions or reaction points?
ElasticSearch Essentials actually supports pushing total reaction counts into the search system; it just doesn't expose sorting for it or allowing a "Postings" tab showing most reacted content. My preference would be support to add a new tab for a "most reacted to" tab over replacing the "postings" tab.