I had been following this thread for a while before making this decision, but I finally told my husband what was going on and we did too.
We were on the July 9 Crown and just hopped on Discovery the following day. We had to move our flights one day which was honestly the worst part (dealing with flight credit from Expedia from a canceled trip from 2020..ugh). Called our TA who confirmed that the booking was under the cruise with confidence and we were within 60 days so we had a booking penalty, but it would be reissued as a future cruise credit.
We rebooked for Discovery in a balcony for $400 less than I had booked our oceanview on Crown 4 months ago. I'll use the FCC in a few months with the 25% teacher discount my husband gets for a quick weekend/short cruise even if this cruise bites (I doubt it will-we are new to Princess and I have heard this is way outside the norm). We are in Florida so we can hop on a short trip to use the FCC no problem-but we have never been to Alaska, so to plan this trip and to have no time to actually see it was just not happening.