Having the same show on three Royal class vessels can be good for Princess but do see it as a major disadvantage to me the customer.
We enjoy the production shows but for most of them there is a limit to how often we want to see the same ones. We will avoid the Sky, Discovery and Enchanted until they get around to changing production shows.
Will still consider the Royal, Regal and Majestic Princess.
Lots of other choices to be had.