DCL is going to charge full price for anything they can. Its a business. They did it during Covid for FAR less than is being offered on the Wish.
I think several of us on this board are... confused as to how this is such a deal breaker/pressure point when the show has been available for years. I would have been livid if they chose either of the two new shows to put on hold.
Also: If you expect everything to be available on cruises all the time, I suggest you actually read your cruise contract before sailing. You basically sign your life away.
The way I see it, they were nice enough to at least let you know in advance. If its such a sticking point, you could always claim Covid and reschedule.