We were were on the Dream, not the Fantasy, but on the Dream I'm pretty sure the verandah dividers can be removed between non-connecting rooms.
We were on deck 6 of the Dream. The three cabins next to us appeared to be traveling together and all of their verandahs were connected. One of the cabins was a connecting cabin to OUR cabin. (The verandah divider between our cabin and theirs -- connecting cabins -- was not removed; but the divider on the other side of their verandah -- between non-connecting cabins -- was removed.)