Char, love the 14 ounce dress!
I haven't done a full 2 week cruise yet, but it's coming in November
On our 8 night back in 2005 with an overnight in Florida pre-cruise, I tried to mix and match as much as possible. For DH and I, we had one 28" suitcase, one garment bag and one 21" carry-on. I find the dinner clothing to be the more complicated to plan. We do use the ship's laundry.
We took DH's suit with one dress shirt and two ties; two less dressy shirts to wear with the pants from his suit for smart casual. One pair of casual pants two casual shirts. Two gowns for me, one black skirt, one pair white capris, one pair black dress pants and 4 dressy blouses that I could wear with any of the bottoms. DH's black dress shoes and brown casual shoes. My dress shoes for the gown(s) and black dressy sandals that can be worn with a gown or capris, and not look funny

All of this and more fit in our garment bag.
For days, we're normally in swimsuits or shorts, which helps with packing space and I had the whole 28" suitcase for normal clothes & toiletries.
I put 2 extra day outfits (shorts/pants/tops), swimsuits and sandals or flip flops in the carry-on. Plus our items for the overnight prior to the cruise so I didn't have to open and go rooting through the other 2 suitcases until they arrived @ our cabin onboard.
I bought rum cakes onboard the ship and had enough room to fit them in our 28" suitcase for the way home. It has one of those expander zipper areas and on the way going I never unzip it so I'll have room for souveniers on the way home

I also try to pack just enough shampoo, conditioner, etc. so I can throw away the bottles onboard the ship.