The timescale referenced in that report is effectively a generation. It will take a LONG time for MAN to more than double it's throughput ... and that is without the (sadly likely) prospect of further damaging wars and financial crises. Anything can happen over 20 years or so ... it is pointless to speculate about which new routes will be operating. And it is quite conceivable that SYD will be within range from MAN for long-haul types by then.
For perspective, cast your mind back 20 years from where we are now. Who guessed that MAN would serve Addis Ababa with frequent widebody flights? Kuwait? Sylhet? Casablanca? Shanghai? Houston? Boa Vista? Sandefjord Torp? Rzeszow? Well done if you guessed them all back then!