Please do! Like many another term we get bogged down with here it has many connotations and usages. It has been useful here because it covers all of the types of mediation being discussed, but very confusing for the casual follower for that same reason.

I just looked it up in 2 very different dictionaries. In my Collins Gem all it gives is the definition of the act of intervening between two people with conflicting views (could be very relevant here). In my Chambers' 20thC it gives a whole range of meanings which include the very general broad one that I have used above.

So, for those interested in continuing the discussion we would do well to itemise the different types of mediation as it applies to folk music and perhaps start using different less confusing vocabulary.