So, Richard Prebble thinks MMP should be dumped because it "robbed" the right of victory on Saturday night. Well, only if you count United and NZ First as part of the right. In one sense, this is justified, as both are certainly right-leaning - but OTOH, both have also consistently proclaimed that they could go either way, and in fact would try and work with the largest party. What cost the right the election then was not MMP, but National's inability to work properly with parties which should be its natural allies. That, and the fact that not enough people voted for them.
It's also worrying when one political faction advocates changing the electoral system purely to advantage themselves. That's the sort of thing that goes on in Africa - or Italy - not a mature democracy like New Zealand. But then, the neo-liberal faction of the right (of which Prebble is a prime representative) was always contemptuous of democracy, viewing it as an impediment to "reform", so its not really surprising that they're advocating a return to a system under which they were able to run rampant and lord it over all of us with only 35% of the vote.