The destination payment and your arguements for it are frankly absurd. Payment for harder flights indeed! Flt crew will want a payment for a harder approach under your logic.
Get rid of all the this and that payments, add it all up, divide it into an hourly flying rate and thats it. More flexiblility, less sickness, and an even share for all. Destinations therefore become equal.
BA will save due to the focus away from 'where am I going/how much' and everyones a winner. Surely you can see this! Your list of payments and rationale behind it show you as a BA CC ostrich
I guess the issue is BA will try to reduce the overall 'pot'......