I know you mean well but being constructive here.
The suggestion of slapping another course for the lesser grades will do exactly what you said you dont want to happen and create that elitism. Plus who would travel that 400 odd mile round trip to shoot targets they shoot every week.
The other downside of putting 'another' course is those shooters will have no comprehension of how far they have to better themselves!
55 yard 40mm kills were out in 91, perhaps we should increase to 60 yards now everyone can afford a useable scope.