I also used my cabin to feed when we went on our subsequent cruises with the baby. It worked fine, his routine wasn't disrupted. However, we are pretty flexible and he was also eating solid foods and taking a sippy cup. The refridgerators didn't have thermometers, so it is quite possible that the milk wouldn't have been cold enough. However, none of my milk appeared to have any problems...no wierd smell, no curdling, and the baby tolerated it just fine when he drank it.
My baby also had a very rough time with the first 2 teeth. Tylenol and a cool clean wash cloth helped a lot! Hopefully he/she is feeling better by now and the crying has decreased!