Sitting on that chair could be dangerous. As far as shadow detail a tad more would be nice but to much and it would distract from the main center of interest.
@Eric Rose What is "the main center of interest?" For me it's the visual/verbal joke, which seems almost independent from the rest of an overall too-flat image. I'd also like to see white stucco. Admittedly, I see this through post-processing eyes.