I thought GP3 had the balance about perfect to be honest. I agree with you 100% that you only need 10% of the course to be a growler, throw in a few tough disciplines and that will do.
When I was 5 I wanted to be like George Best
At 10 I wanted to be Nigel Mansell
At 40 I wanted to be like Tiger Woods
At 50 I want to be like Gilly
Just shows how life can kick you in the nads