TRUE, but that's life though. There are going to be circumstances in life where you might buy product A, it fails to meet you expectations/or is not available, you get a refund and find out that product B ain't available at the price you could have got it.
I'd like to think that QF will offer compensation above the necessary if they downgrade a customer to Y... but perhaps im just being ignorant.
I do feel sorry for airlines, it can't be an easy industry to run a business in - planes break, passengers/staff gets sick, weather, disasters etc etc. Granted, there are better managers than others (and qf's current lot aren't world leaders), but I'm sure passengers being downgraded is not an issue isolated to QF. QF needs to improve massively its communication with customers (particularly proactive comms).
In any case there is no other PE to SIN.