The big picture is on a private page on Flickr.
IMO, you needed to move the people further from the tree, assuming that you want the entire tree in the image. That would make the tree smaller and allow the composition to be tighter.
As it is, the upper right side is empty and the upper, left side is a rapidly darkening tree.
The light is pretty harsh on the people, leaving dark shadows - try bouncing it off the wall.