After youve been on the Leviathan, go to Korriban, complete everything, and choose Uthar's side in the Naga Sadows tomb. After that admit that your Revan, and he will recognise you as Revan.
The best way to play the game is not to plan what your going to do. In KotOR, the first time i played it, i was LS and DS, and was gray all the time. When i came to the rakatta temple, i chose the dark side.
I agree it would be great, but i don't think they'll change it in that way. Theyre going to add one special feature for each character. Like mira: she has the Rocket-launcher