This idea may be good for most people, but for me personally I still love my Tarutaru that I started out with and its name. I would never want to change anything about my Taru since it's the original. You can't change your race and face in real life, and I know this is a fantasy game, but if you truly get bored of your character after capping everything, then maybe it'd be best to have a fresh start at the game and make a brand new character with your desired race to start?
There is one thing I think should be added one day though. I think there should be extra visual changes you can make on your character like them getting haircuts, getting scars, make-up, etc. for those who may get bored of looking at the same face for years.