I changed our way of packing about 10 years ago. Here is the reason. We got to the pier with our luggage. I walked our luggage over to the porter. He just turned to put a piece of some one else luggage onto the pallet, and a bus driver grab one of my cases and was about to put it in the hold of a departing bus. The cruise porter did yell, and got it back. I heard the yell and turned around and saw the cruise porter get it back. after that we would do two rolling carry- on each, with extra space left in each one for things that we would buy. Some times we would use three cases between the two of us.
I also use packing cubes and folders. I always had plenty of clothing to wear. These were warm weather cruises.