Hello racers

I have a question for the devs.
Given the new graphics "engine" is in development is it possible to update the car skins system.
What I mean it would be great to give the skinners/artist more controll over the glossiness, specularity, bumpiness, normalmaps and not just the diffuse channel.
Furthermore is it planned that the shaders can be moddable a bit more than what they are right now.