Phoenix Vision – a comprehensive modification of the game’s visual aspects.

At some point, I realized that I preferred the original helmet model. That's why I gave the creatures back the helmet that rightfully belonged to them.

Whether it's actually their helmet is debatable, even in the concept art, they have a helmet with a crest and horns, and the texture of the crossbowmen also suggests that the helmet doesn't have a crest, and the horns were deliberately removed (but, as usual, they didn't care about the LOD model, and there's also a model of a crossbowman with that helmet in the FPP).