I'm still not sure there's anything too weird about Unit-02's skin. I always assumed that it's supposed to be more of a true black in-universe, and the use of a more blue shade is to allow better detail and contrast, like how Misato's hair is slightly purple instead of true black when all other actual Lilin (ie not Rei or Kaworu) have realistic hair colour. Mind you, completely black skin seems weird as well, but could be entirely within the norm for FAR skin colours since we never see one in any media.
(Incidentally, kind of dumb how they bothered to give the peg-teeth a fancy overhaul, only to have them only last the one sequence. Trivia for anyone who doesn't have the Ha
Groundworks: They were originally supposed to appear in the 9th Angel encounter, but any genga that already had them got corrected to substitute in those insufferable ACTUALLY RED ACTUAL TEETH. Yes, I know she's not going to be eating anybody this time and you don't need the lovely contrast of red against white, but... red fucking enamel. Unbelievable! Why does that edgelord Eva-13 get to have white teeth while our lady Eva-01 gets screwed over like this?
Jo in general has a bunch of decisions that seem odd in hindsight, largely down to it being far more
slavish to the anime than its successors. The Berserker sequence in general becomes something of a red herring given its replacement with the Awakening, and with Q's new version of what Yui is to Unit-01.
But il stop there because I don't want to make this thread go astray a second time.
Based on what we learn of Unit-01 later on I'm not sure her teeth actually are enamel. They might be made of the same substance as her core. I do agree that it looks awful though, and I can't help but wonder why they did that.
Which reminds me that Ha and Q add an extra layer of confusion to the eye debate. Both Awakening sequences show the yellow eye slits actually swelling into the spherical eyes, which makes it look like Unit-01 and 13 (is it Unit-13 or just 13? If seen both) have their eyes shut all the time and there's some kind of luminescent piece over them. 13 in particular gas it change colour when Shinji boots Kaworu from the controls, showing it's mechanical... but it still swells into the organic eyeballs.
Re:MP Eva faces, I hadn't realized the material on the arms was rubberized since I assumed it was armour, but in hindsight that makes far more sense as it allows more range of motion. That said, in several shots they still appear to have a metal piece over their teeth as opposed to the actual teeth, so there must be some mechanical components there.
... And now my head has gone to the fact Bardiel's arm covering being able to stretch along with its arms.