Firstly understand that the rent control act was targetting your colonial renter e.g. aka sbc 红头巾, a room in a shop house, pre 1950 building. By the time it was repealed, probably only less than 3% (and im being generous with the percent) of the existing residential tenancies.
These things don't happen in isolation. Impacted people were already being provided relocation and related benefits even before.
Rents were otherwise on a free market basis. So stop attributing whatever ill to this repeal, it's bonkers. Not even the most hardcore opposition candidate does this.