Legalise/Regulate all the drugs. Given the choice between a 'traditional' drug like Coke, MDMA and LSD and some new alphabet soup drug with no history of human use, very few people will choose the thing they haven't heard about. If there is one thing we have learned since the war on drugs it is that prohibition does not work.
The 2C-x drugs certainly did not arise from the prohibition of older psychedelics. The man who invented them (along with MDMA earlier) was Alexander Shulgin. It was his life's work to discover and test these new drugs. I seriously doubt it was in reaction to prohibition.
2C-x as far as we know does not have a similar safety profile to the drugs you have mentioned in general. LSD is known to be safe in at least 1000x the normal dose. The highest dose in the literature for 2C-B is 5x the normal dose. Certain drugs in the series such as 2C-P have a very low safety margin[1].
[1] https://www.erowid.org/library/books_online/pihkal/pihkal036...