That something that baffles me regarding cruise ships.
Royal Caribbean for example, announced it will move  one of the Quantum ships to Seattle for Alaska itinerary.. and I'm baffled on HOW THE HELL A HUGE SHIP LIKE THE QUANTUM CLASS can fit in the narrow passages?
When I was at the wonder, we had a bigger Princess ship behind us if I remember correctly, and a same sized Holland American Line (RYNDAM) infront.
And the Princess had to maneouver so slowly in the Sawyer Glacier area (there are 3 VERY narrow areas in Tracy's arm).
I cant imagine a Quantum (20 % bigger than the Grand Princess , 280meters vs 340meters) slowly doing a "turn" in the glaciers area in Alaska. or Fitting in small ports like Ketchikan.
In the other hand, speaking of the new Disney ships.
They are way bigger in gross tonnage (almost 6,000 GT than the Fantasy) but having less capacity (3500 vs 4000 people). Makes me wonder if it will have way more large "family" rooms and suites. Similar to the Quantum and Oasis class.. with its 2 floor lofts and suites.