let's see who is singing Belfast Town next year

Presuming you mean Belfast Child, It was released 20 years ago, Jim. The tune is a lot older.

As to comparing the lyrics to other songs - You are just taking the piss now. Your original list of what constitutes a contemporary song in the folk idiom -

1. word dominated, narrative communications of ideas and emotions
2. accompaniment, where it occurs is secondary to the narrative
3. The characters in the songs are identifiable people, usually with occupations and individuality
4. They have problems and situations we can all identify with
5. Structurally they ar four or eight line versified, they may have choruses but they hardly ever repeat phrases other than as a plot device

I proved that Nancy Mulligan did all of that and you did not like it so you added that it must be performed in a folky style, which is fair enough. I covered that. It must now also sound and have lyrics like like a traditional song.

Basically what you are saying is that if it does not sound like a existing traditional song to you, it is not in the folk idiom. Just come out and say it. Most people will disagree but no-one will think any less of you.