It looks like the V3 and A3 autofitting has some bugs in the chest/abdomnen area (not the usual breast shrinkwrapping, but a scaling problem below the breast - see the wireframe a couple of posts above). I have seen this in a couple of outfits.
If I use the same V3 ArtemisX outfit, use crossdresser to convert it to V4, then use the auto fit to convert it to genesis, this particular problem is gone. Conversion is still not as good as with Crossdresser, but much better. Texture stretching remains an issue here and some pokethrough which Transfer active morphs does not fix