Yes, the commission he put together that was the recommendation after piblic consultation. But they didn't offer an exact model so that was the excuse to scrap the whole thing.I don't think the multiple polling places causes a significantly increased risk of tracking who voted, but I'd be ok with making that the lower priority.
Trudeau wants Single Transferable Vote. (I know people just say "ranked ballot" but there are multiple different ranked ballot systems.)
Has proportional representation ever gotten majority support in any Canadian polling?
Even as a general concept (let's leave out the many different ways it could be approached and how that might split votes).