OP, I too do not really understand the gripe. Perhaps you could post actual money movements? Disguised/anonimised perhaps? It would be interesting to see if the real FX moved so much that you were truly out of pocket.

The FX surcharges are annoying, but these are fully disclosed and I would not expect them to be refunded if you chose to cancel your honeymoon, even if doing so what out of your (and Amex's) control.