well considering that registered democrats outnumber registered republicans in florida, it doesn't seem out of the question to pick up between anywhere between 3-7 seats.
Not out of the question, no, but not altogether that likely either.
All those Democrats sit in Palm Beach/Broward Counties and a small other handful of areas.
Pairing Gainesville with some bloodred territory is a no brainer. Gainesville college wackos will nominate some uberleftist who won't be that competitive in any general election.