Got my Genocide packs today and I must say: if you're at all apprehensive about buying these because you don't know what to do with a red Alien, buy them anyway.
The red ones are nicely done and you'll find something to do with them, maybe just pepper them in with the other figures for some contrast.
As for the black ones... they completely blow the Series 1 Warriors out of the water. NECA used drybrushing again (no surprise there), but the color is a more-suitable metallic copper/silver and the drybrushing is actually balanced. There are no areas where the paint is slopped on or the figure is coated in that color.
Teeth and the inner-tongue are the only areas that appear sloppy but even with the first Alien Warrior back in '09, I had to go through tons of them to get one that looked perfect. That was definitely an exception and not a rule. Cheek tendons are improved though.
I'll open these in a bit and take some pics for you guys. So far, I'm liking what I see.