There will be a thread like this discussing the next deployment (to cover 2026-2027) - the thread will start in late summer, there's no real info before then.
AIS shows her going on a sea trial May 7 - assume she'll back to the yard for a few more weeks of work after that before delivery. Sometimes the app shows pre-delivery trips, though nothing for her yet.
On paper the other couple would be split across two cabins and when one of them tries to buy the beverage package the planner would want them to buy for both in the cabin (one of you). On board it will likely be the same issue (with the higher on board cost) -getting an extra key is not the same as actually moving them to a cabin together.
Maybe. It totally depends on how well that sailing is selling close in (past final payment). The mins from inside to balcony tend to be lower than that ($825).
You can see the planner (and prices) for any ship via the web tool hack: Web Tool for Accessing Cruise Planner for Any Royal Caribbean Cruise (Whether You're Booked or Not) - Royal Caribbean International - Cruise Critic Community
On all Q class ships, the norm has been since at least the restart, free rides are in port and longer rides (goes over the sides) on sea days have a cost.