I saw a couple threads floating around about documentation. I think a simple start might be to add the Disqus comment system to all the pages on the website, esp. the API and guide sections.

More robust docs

Topic		Replies	Views
Documentation Suggestion Elasticsearch	2	286	July 6, 2017
User contributions to docs Elasticsearch	4	318	July 6, 2017
New Site / Docs Elasticsearch	6	300	July 6, 2017
Faq Elasticsearch	10	469	July 6, 2017
Re: [logstash-users] Evaluating Moving to Discourse - Feedback Wanted Elasticsearch	2	465	July 6, 2017

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More robust docs

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