We don't "worry" about any of the Rewards Programs. If we find an itinerary we like and a ship we like, we GO! If we get "something" for booking, all the better
There are certainly some advantages to re-booking on the same line, but we've found that we can usually
get the same lower prices from our TA.
I think you can possibly
find a comparable cruise on RCCL for about the same price, if you search for it and have a TA!