The pixeling is very good, I presonally kind of like the outlineing because it helps define the shape a bit more but it does feel a little noisey. The colors pallet is very amateurish but it has a weird charm to it. Very cool piece!
Good improvement with the pose and contrast!
Try hue-shifting your shadows instead of just using darker versions of the colour (e.g. making the shadows progressively warmer or cooler). Without hue-shifting, the colours tend to look a bit boring.
The external AA on this looks meant for a dark background. Perhaps it might look better if you added some sort of scene as a background? Without one, the outline just looks a bit noisy.
tweaked the pallette a bit