Welcome to cruise-chat.
There is a lot of structural steel aft of the rear balcony cabins. Sonny no doubt has some great photos of it. I'm sure he'll post a link to them. These are not balconies for getting a suntan. They are well-shaded. Also note that the Royal Family Suites may have a minimum number of guests requirement. This could depend on the cruise. It'll hold 8 people so RCI is motivated to sell the cabin to as large a group as possible.
Here is a photo I took on the Mariner. The Indy has essentially the same array.