The risk with this sort of meta-discussion is that it drowns the original question about drug policy in an ocean of other relevant questions. I think it would be more interesting to line up the countries that are currently close to trying out a similar policy to Portugal and finding ways to support the movement or at least discuss the particular, national, issues faced.

There's slightly older (2009) systemic review of Portugal's drug policy and it's effects available at: https://www.cato.org/publications/white-paper/drug-decrimina... which is also interesting and has fair bit of stats to back the discussion up with.