Yeah out of Miami I have see them do other ports.... Think one line does Grand Cayman and back to their private island in Bahamas. Port Canaveral is another thing...
My guess is a 4 night sailing out today, will make Nassau no problem for tomorrow. Day at sea might end up further south on Wed and cloudy, but well out of Storm... Castaway on Thursday should be great weather... but if still windy, might not dock.
I think if all the Bahama were a bust... they might find another port of call, but if only one is questionable, they'll just offer a OBC and have another day at see.