i'm fascinated to know why you thought it was so awful, Davros. i thought the pre-war, pre-credits sequence was sweet, the 'wish' thing while not technically bang-on is allowable for a christmas special (i like it when Moff signals 'just go with it' rather than come up with some dilithium crystals), everyone i saw it with thought the 'i know' sequence was hilarious (particularly the kids, who FREAKED at the idea of a lemonade tap).
narnia great, more-scared-than-scary baddies, nice ripley-esque stuff from the mother, naturally-occurring christmas trees, lots of matter of life and death and armstrong giving us his best Niv... what honestly is not to like?
apart from the duvets. i thought eiderdowns too.