Is there a place where I can read your opinions on electoral reforms? I watched the youtube video and I'd love to hear/read more!
There is a place here where I crossposted a speech about my best voting reform. http://forum.dominionstrategy.com/index.php?topic=14544.msg655961#msg655961
This does seem really interesting. I think the one issue I notice is that in places without mandatory voting, you'll have very different election turnouts in different districts. A candidate who is a huge polling frontrunner in one district, for example, might suppress turnout for their whole election, and therefore have reduced power in the legislature. In another district, a close race between two candidates could inflate turnout and give both "winners" more voting power than the candidate in the first district, despite being less popular. The dynamics that result in total number of votes for a candidate are not necessarily comparable between representatives who didn't run directly against each other. It reminds me a little of why looking at total VP across multiple games is a bad tiebreaker in Dominion tournaments.
On the other hand, you might expect voter behavior to change based on a widespread understanding of how the new system works, and so maybe turnout would be pretty high overall.