controversial articles and neutrality problems

Yes, agree. We cannot "force" anything; we can only make what we hope are insightful recommendations.

The page that failed on nlwiki (English translation) looks like it was a proposal to recognize topic experts (PhD's and the like?) -- "A special editor is someone who is designated by others as a specialist in a particular knowledge" ... "A special editor is basically just special regarding his/her knowledge. His/her other skills do not matter...". Under that idea the user was designated a specialist (or expert) in a given field in their on-wiki editing. We also seem to have decided not to go down that route, for various reasons, so this is reasonable corroboration, though we did consider what ways experts and expertise could be best fitted within the classic Wikimedia ethos (given their specific needs and situations) and have found what looks a more solid answer.