Firstly, I wish to underscore that this is an opinion on some of the errors inherent in your interpretation, and that your historical input in general is still a good thing in itself, which I thoroughly enjoy reading btw.
As far as I've understood what you're saying: we don't have primary sources which describe their knightly armour design. If that is not the case, I've wasted considerable amount of time writing nonsense

, however. If that is the case, that we don't know, then we're given the option to a.) experiment or b.) use a generic copy. If the units are given a generic armour, we're also giving them a *supposed* armour. This means, either way, it's still
frog DNA to fill the gaps. It's an unknown.
To give a generic armour to the soldiers which lack description, following your suggestion, we're assuming it was nothing special about our unit. As I said earlier, that could be the case OR not, we'll never really know. To give them a generic armour may seem like the most probably choice, it's certainly a popular choice in the scene. Let's look at the cost of choosing generic armour.
This is an argument made
by Tobias Capwell. We have 13 complete Italian armours, and these overshadow our picture of how we today look at armour. Whenever you see research or reenactment, they copy these because that is part of what is available to us. The result is a very generic scene with little variance, and where the 13 Italians lead the scene. These are hand made objects in their day, jet if we walk around in a medieval reenactment show, it's as if they rolled out of a Chinese factory looking all the same. This is clearly not anything like how it was with the 100,000s that once existed. The knightly armour was custom made, unique to the wearers demands, context and so forth. The result is that our interpretation is skewed by the surviving remains. The same logic applies to our Knights, because perhaps our french fries liked to be
uniform in black armour, we don't know.
Dr. Tobias Capwell once
mentioned that he found textual sources which mention silver or silver gilt (not gold). I've
found evidence which suggest throwing axes close to Bremen. These are examples of elements which are anything but plain and generic. If such examples, and other similar ones, had not seen the light of day, the result would be a more plain and boring mod over all. Our ability to find sources is what dictates these things, but to follow that rule to the extreme leads us with a lot of holes which can be problematic for the developer. The medieval period was anything but plain and boring, nor does anyone really want the mod to harken back to the
dull and gray Rebel faction. This is a cost of assuming--in those cases where we lack sources--everything should be generic.
So this is why I think that, perhaps, there are some errors in copying a generic standard. Perhaps it's ok to use the Mark Twainian license: As long as the 1212 developer understand the relevant sources, it's their product, as the developer to do as they see fit. If you one day choose to be a developer, all the same off course.
Cheers and have a nice day.
~Wille