That would indeed be a worthy goal, @ibstubro. Since our ultraconservative (uh, for Canada) PM is all about prisons and being tough on crime™, it sure wouldn’t be the result of a concerted effort.
But the recent ruling about assisted suicide is probably not part of any trend, as @talljasperman describes. I’m not sure there have been any changes to the marijuana laws lately (though they have been much less harsh in Canada than in the US for a long time now), and recent proposed changes to prostitution laws will make life worse, not better, for prostitutes, according to most critics.