I want to prevent consumer pain due to bad sales practices, but I also appreciate that the burden of proof required means that it would be harder for someone to sue me into bankruptcy for speaking my mind at some point.

"Anything anyone says to a customer must be true" is difficult. "Anything the consumer signs must be true" is a much better, and easier to enforce method in my opinion. There's a long way to go on plain language there (and people can and have already tested enforceability) but it's a much clearer standard. (Not a lawyer, just a citizen)