After more than 20 cruises, mostly Celebrity, we almost always have a verandah and we do utilize it a lot. Really love it BUT on that line smoking is not allowed on verandah, so it's clear breathing. This will be our first
DCL cruise and we chose 8D with the large porthole simply because they do allow smoking on verandahs and we will not take the chance. We're already planning on our next DCL cruise and may try the Navigator's Verandah. Seems enclosed enough that smoke won't billow onto the verandah and into the room. Perhaps you can use the $200 to book your next cruise.
Good luck with your decision. From what I've read on the boards, you cannot go wrong with Disney!
Jennie