Those tycoons paid near nothing for those farmland. Rezoning the farmland without proper compensation towards the HK government is like handing these tycoons hundreds of billions. The HK government prefers buying the farmland from the tycoons at thousands HKD per SQ feet but those tycoons refused. They only wanted to pay the HK government a few hundreds HKD per SQ feet to rezone the farmland into residential lands which the HK government would never allow. That's why the Lantau Tomorrow is so important as it is also a bargaining chip with the tycoons.The farmlands owned by the major Hong Kong tycoons, should now be rezoned into residential lands. These tycoons should be made to make concessions to the government, before they are allowed to build apartments on those farmlands.
Lands around Kai Tak airport should be allowed to be rebuilt with higher density, as the buildings height no longer affects air traffic.
Most of the best view area of Kai Tak have already been purchased by property conglomerates. It is too late for any major changes. The HK government is planning to have some small changes and build some high rise subsided apartments but isn't enough to make a dent now.