It looks to me that Boeing has made a mistake in delaying a new single aisle design, instead trying to wring more money out of the 737 design, particularly with its short landing gear.
The TFR prohibits banner towing and flight training within a 30 mile radius of the PBI VOR, so allowing the Lantana airport to be open will not help those businesses. Two other airports, North County and Boca Raton are in the TFR , so they are open, but basically are restricted to departures and arrivals.
The TFR extends from just south of Stuart to just north of FLL.