I am using lot of community plugins, and it's always hard to deal with elasticsearch (or Kibana) version. Most of the time, we must change the version on the plugin code-source, and rebuild everything, and make the release available somewhere.
So, I have a dream! "hub.elastic.co", like the Docker hub, a place where developers can register a github repository, and elastic takes care of the Continuous Delivery (build / test / deployment), a place where all plugins are up to date with latest elasticsearch, a place with a road-map etc...