Costs
Slipping north and south bound CC in DXB means only one hotel and two sets of allowances.If LHR based CC continue onto SYD and/or MEL it means more hotels and more allowances.With each CC returning to there home ports costs are minimized.
The penny pinchers in finance will be onto that.Also a rumour floating around that the DUgong may fly to JNB.Yes the rumour has been around for a while but it persists.