The most notable attempts of the previous NDP caucus were in Motions 76 and Motions 86.

Motion 76, by Green MP Mike Morrice: https://www.ourcommons.ca/Members/en/mike-morrice(110476)/motions/12180488 This one didn't come to a vote.

Motion 86, by NDP MP Lisa Marie Barron: https://www.ourcommons.ca/members/en/111023/motions/12517157 This one did come to a vote, but was Negatived (101 Yea / 220 Nay) by the usual suspects.

• LPC: 39 Yea / 108 Nay
• CPC: 3 Yea / 112 Nay
• BQ: 30 Yea / 0 Nay
• NDP: 24 Yea / 0 Nay
• Independent: 3 Yea / 0 Nay
• Green: 2 Yea / 0 Nay

Unfortunately, both Mike Morrice and Lisa Marie Barron lost their seats in the last election to members of the conservative party due to vote splitting.

"Alternative Vote" is what you get when you slap a ranked ballot on a first-past-the-post system. The defining features of FPTP that lead to issues decried by PR advocates are single-member ridings which form larger chambers, which leads to highly disproportionate results (e.g. if you have an A/B/C split of 40%/30%/30% across 10 ridings, all 10 will elect "A"). leading to a gradual consolidation into two parties, increased polarization, reduced democratic choice, reduced democratic participation (because your voice actually doesn't matter), etc.

The ranked ballot component of "Alternative Vote" does not meaningfully change any factors of that equation, and can actually exacerbate it -- effectively funneling those few non-major party votes back toward major parties as "false choices". In the all-party special committee on electoral reform in 2016, their report highlights Alternative Vote/Preferential Voting/Instant Run-Off Voting/"Ranked Ballot" (all the same thing) as the single option which would result in even more distorted outcomes than our own First-past-the-post [1]. Australia is the only country to use this at the federal level.

This doesn't mean that ranking choices / a ranked ballot is fundamentally bad, but that it is a feature of a voting system is neither necessary nor sufficient to fix the problems attached to FPTP. A PR system which leverages ranked ballots to great effect is Single Transferrable Vote, which is basically the same but with multi-member districts rather than single-member, keeping top X winners of the district. That said, there are non-ranked ballot PR options which have been demonstrated to have high degrees of democratic success, so its a bit of a red herring.

[1]: Special Committee on Electoral Reform report 3 (2016): https://www.ourcommons.ca/documentviewer/en/42-1/ERRE/report-3/page-177#50 ERRE report 3 p177. See the diagram under subheading "Proportional Electoral Systems" about the Gallagher index

Our voting system is effectively a hand-me-down from the UK (where it is likewise bad and contributing to a number of issues). Your comment is moreso about different levels of government, but whether municipal, provincial, or federal, they all use the same voting system, and they all could use proportional systems (yes, including municipal -- across the board the problem stems from single-member ridings causing distortions when they are used to populate larger chambers. STV maps very cleanly onto municipal politics by just eliminating wards and keeping the same top voted # of councillors).

I played it during one of the later playtests, as a player (homebrew adventure) and GM (Bay of Blackbottom oneshot). Note this was level 1, but level 1 in DS is higher powered than in other games in its cohort.

If you're looking for a game for "crunchy combat-focused fantasy superhero adventure", a la mid/high-level D&D5e, I thought it was an improvement in that combat is actually fun albeit long (whereas combat in 5e tends toward just being "long", without an unreasonable amount of effort, system mastery, and planning from the GM). Out of combat abilities felt a bit weird to me, but I'll chalk that up to my genre preference for lower-powered more grounded fantasy.

For me, as this was during a "what do I actually want out of a TTRPG" phase, it helped solidify that the answer is: none of that! I'll take my XCOM and my improv roleplay separately, please. Unfortunately this means my fancy $200 backerkit books now sit unopened on my shelf :x

When it comes to the greens you really have to bear in mind the circumstances in which they exist. A green party majority government is simply not on the table and not what you should be voting for. Instead, bear in mind that the green party does not enforce any kind of "party whip" -- it's in essence a party of ideologically-aligned independent candidates, and should very much be approached on a candidate-by-candidate/riding-by-riding basis, rather than something like a low profile backbencher CPC/LPC MP where you're essentially just voting for the party itself. You vote for them if you think that they can be a vocal advocate for your community and your causes in parliament, not because you think they'll perform well or poorly if they hypothetically formed government -- they'd have a long road to get there, and if they were approaching that they would pick up more funding, consultants, etc. to help that transition.

One thing that has always stood out to me when hearing from or speaking to green representatives (including my own green MPP) is the level of passion, compassion, and candidness which I have found lacking from many politicians, which resonates greatly with me. But it's something that really should be approached at the individual riding level for the reasons I outlined above.

An Alternative Vote system does not solve the major issues of First-Past-The-Post, and can still have wildly distorted outcomes relative to vote preferences. Unless combined with multi-member districts (aka Single Transferable Vote) it's barely/not an improvement for Canada -- it's a convenient option for the largest parties because it rarely makes a difference to the outcome and the votes all trickle back to them anyway, so they can make a change without making a change.

Here's an article worth reading. https://www.fairvote.ca/expert-dennis-pilon-sets-the-record-straight-about-the-alternative-vote/

The only desirable outcome of electoral reform is one which introduces at least a degree of proportionality -- Single Transferable Vote if you're really itching for a ranked ballot, or Mixed-Member Proportional Representation otherwise (my preference - but either would be a great improvement).