The Liberals have been dangling #ElectoralReform in front of voters since 1923. There have been at least a dozen studies on PR since 1960, and several Citizens Assemblies (although at the provincial level). By 2015 the time for study and reflection was over, and it was appropriate for the ERRE commission to make a decision.
Which they did.
Then the Liberal government made a unilateral decision to ignore the report and act counter to the will of the voters.