Got the new UI today.
During the booking process the main screen after selecting the room type where you could note high floor/near elevator/type in 45 character requests, etc. is gone. I was prompted to login with the splash screen and brought immediately to the "want travel insurance?" summary screen and a "Book Now" button.
Lipstick on one of the biggest pigs I've seen in a long time. The Marriott website is pathetic.
-RM