This is a very different -- but welcome -- addition to the collage of films, cartoons and shows that portray the great Christmas story. There is nothing wrong with this being different, don't watch it if you want a simple, faithful retelling which will never meet up to your expectations and the perfections established by the excellent films. This *needs* to be different, this needs to be an alternative telling of the timeless masterpiece.
Watch this with the most open of minds, and you most probably will not be disappointed.