|I think, after looking at this one a dozen times now, I would have liked diffused light much better overall, since he showed a strong preference for soft light in the Happiness collection.
I think the two biggest distractions here are the slightly off-kilter perspective, and the shadow - how it intersects with the blue area. I do think you've centered it well on that line, intentionally or not, so that's at least as well as it can be placed, if you wanted it to split the white and blue area. I know I would have preferred this if the red spot had been on a rule of thirds line, or had at least been moved to a slightly more compositionally friendly location.
Of course, with all that being said, perhaps this wasn't something you could move.
Still, this is really nice, the processing was perfectly done to bring out the colors and textures, and the shadow is the perfect shade, even if I don't like where it is.