Absolutely, the vote splitting has cut both ways (all three ways, including the Bloc Quebecois). Three broadly left/centre-left parties are competing against a right that is, on the surface at least, united. All three of them stand to benefit from electoral reform in a way that the Conservatives do not.

Much of the Conservative strategy is around splitting the vote. In a post-electoral reform Canada, that strategy becomes useless and the Conservatives will have to bring something new. Their ability to pivot to a completely new strategy within a single election cycle is questionable, so getting this done is directly in Carney's interest right now.