The bottom line is that I think that whatever consensus the committee could achieve towards greater proportionality would be better than our current system. I would be truly open to either MMP or a single transferable vote, if that were the consensus of the committee, because I think losing this opportunity to move to a more proportional system would be a sad thing.
That said, there are constitutional limits to how we should approach this. It should be regionally based. It should reflect the proportion of elected officials that our Constitution requires. So there are certain built-in constitutional constraints. I also believe that if we truly want to enhance democracy, we should avoid lists that are entirely structured by parties. This should be about voters more than about parties, so either open lists or no lists would be preferable, but I am convinced that moving to a more proportional system is the key—and yes, of course, design matters.