In the meantime, under his legislation some entitlements have been dropped and claimants report others have become more difficult to access.
Labour and the Greens argue the pendulum has swung too far and claims are being unfairly denied, as was explored in a series of articles last year detailing hundreds of elective surgery claims that had been turned down. Following the Herald's series, the ACC held an internal review and found it had rejected too many elective-surgery claimants and would improve its processes.
Labour's ACC spokesman, Chris Hipkins, said his party was committed to making ACC more receptive to claimants as "a comprehensive, universal and public" scheme and would halt or roll back National's move towards privatisation.
The Greens' ACC spokesman, Kevin Hague, said ACC under Dr Smith now had a "culture of disentitlement".
"... we would be looking to wind back pretty much everything that was in the ACC Amendment Bill. We believe that was all about erosion of entitlements and was a betrayal of the scheme's original principles."
The Greens want to return to "pay-as-you-go" funding as they see pre-funding as a precursor to privatisation.
Mr Hipkins said Labour would continue with the current funding model as the scheme was now close to being fully funded.
Meanwhile, National has tossed voters an election-year ACC sweetener - recently confirming levies would be cut next year.
Labour argues National can afford to cut the levies only because it was charging too much after unnecessarily raising them in response to a "manufactured crisis" about the scheme's sustainability.
The Maori Party says it has concerns that privatisation would see levies rise, "which would push the affordability of its protection out beyond the reach of our low-income families, many of whom will be Maori and Pasifika".