Hey Shadow, it's lovely. How about a beautiful applique of the family surname above the tree? "The Smith Family" or something like that....I also like the idea of a cat on the wall or little birds in the tree. Another idea might be to take the shapes of the leaves, and alter them slightly, and in a darker shade of green, blend them "behind" the leaves that are there already. It would fill it in a little bit. I hope this helps. Those are just suggestions, but really, it's fine the way it is too. Good job!