So, if I understand this, the portion of the panhandle currently in the Central time zone would be permanently on CDT (=EST), while the remainder of the state would be on permanent EDT (=AST)?
That essentially adds a brand new border all the way around the state of Florida, which would involve being an hour out of sync with every foreign neighbor (e.g. the Bahamas & Cuba, as well as with every US State and Canadian Province in the Central and Eastern time zones. So during standard time, if traveling from Miami to Nassau, you'd actually go BACK an hour.
This sounds certain to cause great confusion, not to mention the disruption of commerce. I wonder what the odds are that the US Feds will approve it.