I'm booked on the Costa Victoria and my cabin does not seem to have any neighbouring cabins on either side...so I assume that the empty spaces on the deck plan are probably for linen and housekeeping staff.
Is that a good or bad location? I hope it's not noisy and want to fall asleep at a normal time and not get woken up before 6am.
I don't think the staff start that early. Sometimes I'd be out around 7:30 a.m. and not see housekeeping yet. They know people want to chill and sleep-in. It's not like a hotel where you may have checkouts and you have to turn the room around. Plus, I don't think they do heavy duty cleaning everyday. The sheets don't get changed everyday.