Ah its clearer now. I initially thought there was no F option tomorrow. If that is the case, then the prophet of doom (aka Dave Noble)

is technically correct in the sense that you opted to take tomorrows F flight (over a Y seat on Air NZ today). However you have been delayed thru no fault of your own and I would expect some sort of compensation (ie miles or cash) even though technically EK may not have to provide it.