When I first heard of it, that Coldplay a Christmas carol is published, germinated in me first the fear of a new FELICE NAVIDAD or anything Worse again a common LAST CHRISTMAS.
However, considering Chris Martins career as a songwriter, it seemed almost impossible that he could be now attacked by George Michael simplex unsäglicharis virus.
In short: The red alarm can be turned off again and there is no reason to panic.
Coldplay presents us a thoroughly melancholy song with a tick hope in it.
No Xmas Gassenhauer in the style of the above mentioned, but more something between Longfellow PEACE ON EARTH and ANOTHER CHRISTMAS SONG by Jethro Tull. Not as global as the former and not the latter for otimistisch like, but the main thrust sharing: The desire not to be alone to have, but the people that you love to have - just for Christmas.
Whether the desire of the protagonist comes true or not remains open, but he hopes it is strong and the Christmas spirit that inspires this hope. Just as his blood alcohol level.
At the end of Chris Martin wishes him that the Christmas lights may go out never so his misery will soon be over and solved his problem.
I'm assuming that he therefore also the other people wants.
That's what I'm doing well and wish all MERRY CHRISTMAS!
LG from Shenzhen
Jens