That would help, but just adding complexities to the act of voting could turn people away (just as offering more possible modes of response to surveys can sometimes decrease response rates).

Whether that would be a good thing or a bad thing depends on what the purpose of voting is. If the purpose of voting is to benefit from collective wisdom, perhaps preventing less educated/intelligent voters from voting is a net positive. However, if the purpose of voting is to represent diverse interests in order to more fairly allocate societal resources, than preventing less educated/intelligent voters from voting could leave them less effectively represented.