I read this story in this morning's paper, and it seems to be an item of historical interest, but not necessarily historical significance.
The article I read said that it appeared to be a hand-written copy of "an original", and may be of more use as a tool for decyphering ancient Coptic, but there was nothing about this document redefining, confirming, or disproving anything in the Holy Gospels.
There were many, many early Christian writings in existence. Many of them were contradictory.
The ones we find in the New Testament didn't magically appear one day at the end of a copy of the Old Testament.
It wasn't until much later that a committee met and decided which of the early writings would get that special honor.
I agree, this is much ado about nothing.