I did not hear that song in its entirety until years later; I thought it was quite pretty. When I finally heard all the lyrics, I no longer cared for it.
(Though it is beautifully performed.)
I much prefer "Chris Squire's Swiss Choir" if I want Christmas music from a prog-rocker. A FReeper turned me on to that album a few years back.
if you like Christmas tunes... The Band had a great one called...”Christmas must be tonight”.