To answer your question, "we" are not going to fix the phony FPTP problem because when the Liberals learned their Ranked Ballot ploy ensuring perpetual power was dead in the water and a PR system was the only viable option to FPTP, they lost interest.

The Liberals lost interest because, unlike conviction parties like the NDP and the CPC, they have but one guiding principle:  say and do whatever it takes to seize power and then say and do whatever it takes to keep power.

A PR system would turn their solid majority government into a shaky minority government (as it would with all but 2 governments over the past 60 years).  

Did you really expect the Liberals to go for that?

In any case, it was smart, cynical politics.  It got them some 2015 votes from gullible former NDPers who figured that Trudeau was somehow "different" than previous Liberal leaders and deserving of switching their support to the Liberals.

And if they had rammed through an RB it was "Roll Out The Barrel" forever.