Both Logstash and elasticsearch are great - but they both suffer from the same flaw: they're a pain to deploy and it's a pain to manage their packages.
Like I always say, if it's hard to use or appears to have major flaws or pains, it's a bug, and we can fix it. Let us know! :)
[1] http://ruilopes.com/elasticsearch-setup/
[2] http://www.elasticsearch.org/guide/reference/modules/discove...