Having nylon as a separate material to plastic is probably fine, but that means we need to add special materials for half a dozen other plastics as well. Which is also fine, but it’s a lot of work and I don’t see it being overly helpful. Extra realistic perhaps, but not actually better in any way.
I don’t actually see how separating leather into soft and hard is going to make any difference whatsoever. Like you said, most modernly available leather is soft garment leather and you can easily layer it and treat it into armor, just like the boiled/plated leather armor recipes do. I don’t see that having to process the leather separately for a handful of recipes is actually going to make anything better. Lamellar armor already exists in game, at least in the medieval items mod.
Titanium is around half the weight of steel and a little bit weaker. It sure as shit isn’t “feather light”, and it isn’t some magic metal that will make super strong armor without encumbering you. I need you to understand that the thinner and lighter you make a material, the weaker it gets and the less it can stop. Stronger materials will remain stronger and SOMETIMES you can mix materials to get an overall stronger material, but it still needs to be of a decent thickness to protect you. Even then, if you want full coverage to protect all your sensitive joints, you need even MORE material to cover them, which surprise surprise, means more material. Which means more weight, and more encumbrance, because you now have plates of metal/leather/kevlar/whatever hanging over your arms whenever you move.
Well I’m not sure where you got the idea of superalloy being like platinum from, but I’ll humour you, and we can examine it’s characteristics. It’s light and strong, like titanium, expensive, like titanium, and used inside the body in bionics, like titanium. Holy shit… I bet it’s titanium. Or something very similar, probably a high end alloy involving zinc and titanium, like some common real life superalloys?
Look, if it was so easy to make amazing armor with a few sheets of titanium someone would do it. I’m sure. And that stupid tuxedo just has a kevlar vest, so don’t bother bringing it up again.