A lot of people are so used to the highly saturated, contrasty style of images displaying "pop" that they don't respond affirmatively to images made in the style of this one. Add my name to the list of people who really like this exactly as it is.
Be careful about tilting the image to the right, as I fear the reflection of the tree will not be properly positioned under the tree. Whatever you decide, you may have to strike a compromise with accuracy to achieve a look that doesn't make people think the photo is tilted.