I just noticed something:
Are the coats of plates correct, the way they are currently? Compared to all the other armours they look somewhat strange to me...
First of all there is the same problem like with those norman and kettle helmets was: the saturation of the colours is way too high, some modern housewifes would be glad if they could keep such a bright red in the sweaters of their children
And don't forget the pure white of the Teutonic coat!
Then: I googled it a bit, and I saw the tabard could look this way, indeed, but I think it's only for infantry. Why do I think so? Because there is no vent (online translator) between the legs, to be able to ride a horse properly. All the other mails are cut in up to where the balls are, to make riding easier and more comfortable.
And the last point: I think it would look better, if there weren't only vertical "stripes" but also horizontal, to create a real chequer, so that you can actually see the plates. The last point is not that important, but I think as you are already changing the textures (if you accept my suggestion) it would make things look more pretty.
Edit: just look yourself:
In fact I think the coats are really ugly
Edit2: And you could rename the Teutonic and any HRE coat of plates to "Spangenharnisch", as this is the old German name of it.