First of all this is only my opinion, but I think that the helmet, awesome as it may be has some flaws in my eyes.

1] The material texture of the mask/ beak part is the same as Limbo's chest area, which is a bit bland. Giving it either a glossy porcelain like texture (in lack of a better example: similiar to the back part of Hitsu San's Nova Visage skin) or a texture similiar to the metallic finery on Limbo's back and arms might have been a better choice
2] The mask shares the color with the chest area (color 2). This limits coloring options in my eyes a lot, while giving it color 4, which is mostly meant for such small details, might have worked out better.

Nonetheless I already bought it on console instantly as I love the design and I hope for more awesome creations in the future.