Big fan of the preset build sprites being funky edits of their respective callings/castes, by the way. It's a good compromise for the fact that sprites can't dynamically represent every mutation combination in the game itself. Using the Dream Turtle sprite for any carapace build, the Gunwing sprite for any wings build, and the Marsh Taur sprite for any multiple legs build, etc just feels... correct.
The true kin sprite edits are less useful, but also nice to have.