The only purpose of having a referendum is to not have electoral reform, unless you can clearly define a way to educate voters about the choices and options that are put before them, and I don't see how that's possible. That's exactly why the citizens' assembly was created. We spent 11 months learning about the system, hearing from the public, and deliberating.
If a way to convince voters to read and learn about electoral systems can be found, then perhaps that would work. Otherwise, voters are going to just take what the campaign spin is on the different questions.