as a young driver myself i personally think maybe not limiting younger drivers to certain horsepower or 0-60mph speed will do much i think that you should be taught to drive the car your going to drive or have different licencing e.g.
fwd, front engine up to 110bhp
fwd, front engine up to ***bhp
rwd, front engine up to 300bhp
rwd, front engine up to ***bhp
rwd, rear engine up to 600bhp
awd, front engine up to ***bhp
and you get the idea, i think that would help people alot although maybe even only like an extra test or so instead of a different licence