Visual Calls
I understand your point totally and i have heard poor RT from both fixed wing and helicopter pilots.
I am a PPL that trained, qualified and now fly from a site within a controlled zone. For this reason i am comfortable with the RT as it's something i have grown up with.
I do believe there are PPL's that during training hardly ever fly near a control zone and find the prospect of talking to major airports quite daunting.
Maybe this is something that should be addressed whilst training ?