Hi,
There is now this new concept of using ingest pipelines instead of Logstash pipelines, but the Filebeat would be fantastic, if there was a module for SharePoint ULS logs. There a quite a few farms out there, which would benefit from it.
Do you think it might be possible for you to create such a module? There is this as a proof of concept, but it is using Logstash.
#featurerequest