Research reputation isn’t the only performance measure now
ERA used to be the ARC’s only system-wide register of review and as such what universities pointed at. But it is not, never has been, the whole story and for years a coalition of institutions and interest groups advocated for a second measure of research impact and community engagement. There was even talk of a new model replacing ERA. Advocates got some of their wish a couple of years back when the government commissioned the ARC to develop a second set of metrics.
The first resulting engagement and impact report is expected soon-ish.