Oh wow, sorry you had that experience, we were very lucky then. Trotting down to the nearest public toilet one, twice or three times a night, as my husband(and others) would need to do would not be my idea of fun.
I must add here that we had an amazing cruise, and as we only went to the dining room about 5 or 6 times the noise/vibrations was not a huge issue overall and did not affect our enjoyment. Off topic and a first world issue though, I was, shall I say, amused and slightly concerned, by the size and quality of the muffins every day at breakfast time in the Lido buffet. What have they done to them? The double chocolate ones were about 1 and half inches deep and looked very strange, tiny all round. They removed the whole tray of them and replaced them with a different kind early on during breakfast. The blueberry ones were not much better, small, with hardly a blueberry in sight and didn't seem fluffy like a muffin should. Either they changed the recipe or bought a less quality muffin mix. However, they were perfect in the Chart Room for morning coffee, just like before, so good. They must make them elsewhere for there. I guess Cunard must be looking after our weight and health😂