I think the idea that text and tune go together is wishful thinking. The statement that a ballad is not a ballad without a tune is ridiculous in the extreme. The earlier collectors had many of their versions recited. As I stated earlier, Greig's most prolific informant recited every one of her ballads. A substantial percentage of Child Ballads have no evidence whatsoever of a tune, as a simple glance through Bronson will tell you.

David is entitled to use the word 'commonplace' in any way he wishes, but the word should not be taken as derogatory just as 'cliche' has a meaning that is in no way derogatory. Also in its broadest sense 'commonplace' can refer to any grouping of words you want, a single word if you wish. The fact that some academics only want it to apply to their preferences is neither here nor there.