@Elitre says (and @Whatamidoing-WMF seconded that):
https://blog.wikimedia.org/2013/03/18/how-to-create-a-good-first-bug-report/ it'd be useful to have a Phab version and/or someone reviewing https://www.mediawiki.org/wiki/How_to_report_a_bug.
Anybody is very welcome to draft a blogpost and I'm happy to help by providing feedback and co-editing.