I didn't see the part of the article where people in Portugal were having doubts about the policy. I saw that some cities were considering re-criminalizing drug use in certain areas, such as around schools. By and large it sounded like a successful policy that they aren't looking to get rid of. Maybe they'll tweak it: the biggest complaint in that article as about the visibility of drug use, not the effects of drug use, so if that's the problem, maybe make the equivalent of an open container law for needle drugs. I don't know. I'd trade that problem for the problems most countries have.