Looks to me that it depends on whether or not the elector is bound to vote for the candidate who won the popular vote in Florida. The FL Supreme Court has ruled that an office requires a delegation of sovereign authority. If the elector is bound to vote in a certain way, then there is no such delegation. At least in my opinion.
I think my view is strengthened by the additional requirement that an office must "... embrace[] the idea of tenure, duration, and duties in exercising some portion of the sovereign power ..."
There is no tenure or duration for electors. They are elected to do one thing, and then they're gone.