i have not. But first of all
a) Do you need shows? Or can you enjoy a good book or a strole on the promanade?
b) Instead Of toaking shore excursions EVERY port only take lets say 4 or 5 that look really specail.
c) Days at sea. It all depends on your liking, this is no oasis of the seas. Do you like to swim? Swim in the pool! Do you like Gambling/shopping? Go ahead, its a vacation!!