… still gives disproportionate power to the winners-taking-all because it is a half-and-half system. I wish NZ had put proportional voting in place with a threshold (of for instance 7 percent of all votes before a party can get seats).
It has. It's 5%.
Unless it's changed since I was last in New Zealand.
I was, however, the manager of the call centre team that manned the phone lines for the public education program in the run-up to the referendum that saw MMP (mixed member proportional) adopted.