I picked up the Carols for a Cure 2 CD set after one of the recent performances. It's not terribly Christmas-y. Some unusual tracks (the cast of WSS doing Jingle Bells as if written by Bernstien in the style of "Cool" - its sounds very strange.)
But then my taste in seasonal music runs more towards big spectacular, though traditional styles like the wonderful Charles Gerhardt arrangements for the Royal Philharmonic (for Readers' Digest) and Arthur Harris's similar arrangements for the Philadelphia orchestra (on Columbia.) These I play EVERY year. I won't be playing Carols for a Cure much.
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com