Leigh - If I am not mistaken, the cabins you described are the Cat. 9 Cabins. Because they are on a corner, you get more windows, the room is larger than a standard balcony room and you get a great balcony. Below is a photo of the balcony on a Conquest Class Ship - your balcony would be identical.
I did not notice any excessive wind, in fact, I felt like there was not much at all. I also never had a problem with ash. I had kinda expected it because I have heard mention of it here, but - nope - none to speak of on our balcony. Maybe it was just my trip
Hope this helps.