Hussar
Legend
You are confusing "Having RAW" and "Having a well researched, really good RAW". You almost never get the later. And given that, merely having RAW gets you nothing in this category of concerns.
For instance, you seem to imagine simply doing a "smigeon" of research on the matter of "tracking over cobblestones is more difficult than hearing a noise through the ground from ten miles away." would yield a "good" and "well researched" RAW. To me, this statement has no basis in reality. In fact, I find it hard to take such a claim seriously. No "smigeon" of research in such an esoteric subject will yield good results. Better to spend your time giving people good guidelines to judge it themselves should the topic ever (on very rare occasion) come up. I really REALLY do not want rules writers to be researching that level of minutia just to put out a game.
Same goes for your other highly useless factoids. This is not a medieval fantasy simulation game - we don't need a bunch of research on the ability to swim in armor or ability of a katana to cut through a tank.
Well, considering at least the swimming in armour thing has come up in games I've played, I'd hope that a tiny bit of research by the developers could give me at least a baseline answer. And, oh look, in 3e onwards, they added skill modifiers for armour that, by and large, work.
What does "medieval fantasy simulation game" have to do with anything? If you are going to make mechanics that are based on believability, why not actually take the time to look into how things actually work in the real world?
Thing is, IME, rulings from the gut are almost always wrong. They are almost always more punishing to the players than reality would actually be. Mostly because "gut feelings" don't take a lot of factors into consideration - like the idea that someone running away might drop something, or snag something, or is maybe bleeding, or his horse poops or whatever it is that you use to track. Having a RAW baseline at least puts everyone on the same page.