BettyGirl,
Don't forget that 1000 of us have signed the offer. So the scenario you suggest of all the good routes going to Mixed Fleet is just fiction.
As LM has already stated the cost savings of MF on the Singapore terminator are £4million on that route alone. If you think the company are going to let that and other similar savings go because 1000 signed up to a deal while the other 12 thousand odd live off the fat, still enjoying SIN/HKG/NRT etc then I think you might be disappointed.