Perhaps related, but I find minority governments to be the most aligned to how I think things should work. It's not that they can't get anything done, but rather they have to actually engage with the other parties to find common ground. Crazy idea, I know...
My understanding of what happened with the electoral reform promise is that the Liberals wanted a specific form of electoral reform: ranked choice. Unsurprising, because as the centrist party, they would stand to benefit most from that system. Which isn't to say I necessarily disagree with it; personally I think a system that encourages moderation is probably a good thing. Anyway, when the committee they put together to study the issue didn't come back with that option, they just shelved the whole thing.