Way back to the original post: a common 'error' for CPL's under training we had was for them to plan and fly a route that was pilot friendly rather than commercially efficent- classic example was to get airborne from the uncontrolled home field then track away from the neighbouring controlled field to go around it's boundaries- what they had always done to reduce workload etc. Commercially it was better to get the atis on the ground, get airborne, change frequencies, get a clearance and go direct- higher pilot workload but far more efficent from the operations side of things.