As with the AV referendum, which was defeated by Labour, it's up to Ed Miliband to do the right thing.
Do you regard Ed Miliband as having done the right thing last time, after all he personally supported it, but could do little to stop most Labour voters using it as a opportunity to kick the Lib Dems given it was an essentially meaningless and self-serving system you'd bargained for?
Of course he has much more control for this, so it'll be interesting to see Labour's response. I'm of the opinion anything's better than the current arrangement, and would prefer a proportionally elected setup although I have some misgivings about the proposals.