I see no harm and much good in what Mike and Charlie are doing. It is not like changing words to fairly well known songs, which I generally do not like the idea of, except to make things scan better and change racist words....but if someone has a body of work that a lot of people are just not familiar with, and they are true to the original, acknowledge the original, I think it is basically a good thing. I would not update words, grammar etc. but would edit for singability..that would mean generally removing verses, combining verses, perhaps shortening lines etc. Some poems are just too long to sing. Some songs are just too long to sing. We do not feel obliged to sing all of Matty Groves so I don't think we should feel obliged to sing all of Kipling or Fox.