We have been on older ships going to Bermuda and the Southern Caribbean, both of which are in some very rough seas for two days going and coming back. The only noise we heard in our cabins on those cruises was the hangers clanging in the closet.
This creaking and clicking in our cabin on Beyond was all day and night only going to Eastern Caribbean, no rough seas...it can't be blamed on rough seas. If you pressed against the walls or ceiling, the creaking stopped in that spot.
Everyone we talked to n our December cruise who had the same problem were also in an Infinite Veranda. We are going on Beyond again in May with a group of neighbors, but we have booked a Sunset Balcony. I will let you know if there is any creaking in this cabin.