It baffles me that they won't go a little bit extra length to make separate pieces when they need to remodel it for every race already AND the 3D meshes aren't visually connected so in theory there wouldn't be some sort of "Oh we need to re-draw the meshes for this piece" when, let's say, making the shoes its own unit.

It feels like they just want to stick to how it is, one piece and undyable, to preserve the NPC's visual - which is kinda sad because otherwise it would make the bundle more desirable and I bet more people would throw money at.

I don't have data on this, but one thing I know for sure: I play the game a lot and it's very rare to see a soul glamouring these undyable onesies.