This is obviously just a theory but I think
DCL is doing A LOT of private discounts right now to fill the September ships to keep the general public rates artificially high. I previously commented about the Sept 26 fantasy doing a cabin disappearing act within a couple of hours and the transatlantic is now sold out as of a week or two ago but when I had been looking there were a bunch still open (and I do the test reservations where you get to the select a stateroom part and don't just base it on number of categories).
There was also the other thread where the person reported a $500 fare for her family of four (tipping an infant thread). I think they way overshot on some of these fares and are trying to see if they keep the "expectation" of high fares will people go ahead and book instead of waiting for the GT rates. They said last year they were playing around with pricing structures and I think it got out of hand.
At this point some of these cruises are in the top end luxury cruise line bracket and while Disney is great, Crystery Cruise Line it is not. And, when I see trips around the world for only 3x more than a 7 day Alaska on the Wonder (albeit different staterooms) something has gone seriously off kilt.