This is a major improvement from your first piece (y) great work! I think what it lacks right now is pixel-level polish...you're on the right track with the small bits of AA you have, but I think you could perhaps make the palette more dynamic and do some closer refining on edges and patches of shadow...you may also want to think about upping the contrast a bit--it all sorta melts together color-wise; a pure white hue here and there would do wonders....but other than that, this is a solid improvement. Good stuff!