Browsed the editor for a bit and felt Japanese had far less blurry units than Byzantines lol.
While browsing I found out that the Byzantine Limitanei actually has broken textures for Castle Age, which is what you see in the image above. Here is an image showing Limitanei’s Dark Age to Imperial from left to right. I confirmed that this was the case ingame as well.
Though Byzantine has some delightful models as well of course.