so the consumer can clearly see how much of their money is going to whom.
I'm not sure this is correct, since it is not clear if the airline passes the money on or not. Are the airport fees based on the amount they pay the airport or the normal fee regardless of any negotiation (ie are Ryanair inflating the airport fee?).
Also with regard to APD when a person does not travel they should not lose their APD, however, in many cases airlines with hold this as they say it would cost admin fees to refund it.