I think it's time for us to get the option that if we unlock humans level 50, we should be able to customize any human-race class such as Jedi Knight or Sith Warrior for example, with any type of face tattoo or make-up. For example for RPing or back story reasons, if you wanna use some Bounty Hunter style Tattoos or Make-up to apply to you're Sith Warrior to make him look like a Hunter that is you're choice.
As for Jedi Knight and Councilor, as for humans i seen no unique face tattoos or anything for them even when you complete the level 50 Race tree thing for humans i does not unlock face tattoos of other classes and other editing options to make them feel unique compared to the single face and a beard (If you're male).