This is happening time and time again. Congregations have been ponying up the funds for new halls for years only to have it grabbed by the LDC. They have then had to wait a couple of years and onwards now only to be told that nothing of substance will happen. As Stephane says, the onus for managing the maintenance of ageing facilities falls on the local congregation. This is no major problem for those congregations with more modern facilities but for those congregations with knackered halls then they are looking at fairly major works.
Alternatively, a hall is sold with the existing congregation told to go to another facility. This is exactly what has happened in Brighton. The funds from multiple congregations were grabbed, a facility put up for sale and no upgrades or new halls instigated even through the other halls were now getting more use.