Im no artist or anything like that, but in my humble opinion some of your 3D models (or sprites as people call them on this forum) seem to be too thin, specially in torso, they look like starving men who dressed up as soldiers. Remember that bellow heraldic tunic, most of these men wear either mail armor or some sort of plate armor, and even bellow that several layers of woolen tunic/shirts etc. There is no way they can be so thin (torso area specially).
Secondly, most of these models should have spears (bardiche in the east) instead of swords (specially these swords that look like nordic ones, if you really want swords then make them longswords/broadswords or even bastard swords) since spears were much more common weapon, sword was more like toys for nobility.
This is a quick draw of what id like to see:
A typical medieval sargent armed with spear and shield, wearing heraldic tunic over full plate armor with shoulder guards and traveling mail coif (some kind of helmet could be added instead, great helmet or whatever). Central field on the front side contains area for heraldic amblem (cross in this case) while the shield could be painted by country's colors. I drew this in about 5 mins so dont be too harsh (like i said im not an artist) but if you like this i can make more.
