I think the simplicity but the well done body shape and facial expression make this really good no matter if its simple...(i think you mean by the rest of you actually do) but its quite an awesome simplicity ^^
It does not suffer for not being fully worked up. I feel it's simplicity complements your beautiful drawing/composition. I wish I had had longer to work on other ideas for the project too. There have been many brilliant deviations submitted. Good luck with yours.