Part of the Visual Editor / Wikitext comparison dashboard is to analyze the failure rates and types. This is instrumented as part of the Schema:Edit and available in EventLogging data under Edit_<<schema-revision>>. To see it visually, the dashboard is a bit clunky right now without bookmarks, but here's what you do:
* scroll down to Failure Rates by Type
* click on the BOTH button in the upper right, or just the WIKITEXT button if that's all you care about
* de-select everything in the graph except the "conflict" reason
What you're looking at now is the percent of edits that ended in an edit conflict since last April. (The huge amount of data is why the dashboard is taking forever to load, I gotta check on that with Neal).
I'm not sure about this BufferingStatsdDataFactory thing, I'd love if someone more familiar explained more.