While having a wide variety of hair styles is important, I think it's also important to have some "non-traditional" hair for certain races. For example, the Py'rai wiki picture is the female with long black hair that looks like normal human hair. I think it would be great if the Py'rai had options for hair using textures like moss or leaves instead. For other races, such as the Vek or Ren'kai, there could be an option for having horn or needle like hair. Even a bland "bald" hairstyle could have a lot of variety using different balding patterns and piercings.
Interesting! Do you have examples of hairstyles that you think would go with those races?