SQ/MH may be happy with the traffic in tourist class,
They are even happier with the traffic in business class!!
Full most days.
EK are also looking at a 3rd daily service and SQ will be expanding to a daily direct B777-300ER next year.
QF operated to MAN for many years with a B747-400. Service was pulled when BA bought a 20% stake. With that out of the way QF are their own boss no matter what code share agreements they have.