The Ballot Strategy Initiative Center has a new report grading the 24 states that allow citizens direct access to the ballot.
Their standards are pretty tough: only five states got a C or better. Florida got an F.
I'm not sure this is entirely fair, as it fails to account for the important role of the state courts in policing Florida's ballot access system. See, for example, Patrick Gudridge, Complexity and Contradiction in Florida Constitutional Law.