They will absolutely hold on as long as possible. The Government believes it is clawing back support in the polls and that if they can continue to launch Labor tax scare campaigns effectively, they could hold office. Aside from that, they have no hope.
I personally believe the polls have been indicating a 2-3% swing to Labor for several years, so this means a change of government is all but assured.
Most people aren’t retirees or even close to it so don’t care about Labor’s changes. Also most people don’t negatively gear and accept owning a first home is more of a priority for anyone rather than owning multiple. These are carefully calculated policy moves from Labor and I think the Coalition is flogging a dead horse. It may return some of their base to them (the people that have drifted after ScoMo took over etc.) but it won’t change enough swinging voters intentions to alter the election outcome. A likely majority Labor Government.