I think we should be a lot harder on recently passed drivers. Black box, not allowed to drive at night, only allowed in the slow lane, etc.... and then if you commit offences, you go back to this world of the police monitoring your stupidity.
Then if you are safe driver, you should be allowed extra leniency, but tbh i think this happens unofficially already.
I think a lot of the problems come from the fact that no one has faith in the system, thats why people speed, cos they thinking "everyone else is."
Whatever they do, it should be better enforced, you will always have the few that think that the speed limit doesnt apply to them in their M3's.
I'll end with a cliché, sorry. "If it aint broke, dont fix it" we have the safest motorways in the world dont we? we must be doing something right.