“I think these edits outweigh other considerations,” McColl told the Guardian in a different interview. “If this text is to survive another 200 years, it needs to modernize and reflect today’s realities.”
Yes, people have been attempting that with The Holy Bible for the past one hundred years or so. Really works out well, doesn't it?
For the record, the original, "un-edited" poem is attributed to Clement Clarke Moore, whose estate in the Chelsea neighborhood of Manhattan became The General Theological Seminary, once the flagship institution for clergy education in the Episcopal Church. To this day, each December the seminary's dean reads the poem to the children of seminarians. It's very charming, actually.