So in the end I decided to keep the pattern simple, and just make another dress with a plain bodice with a gathered skirt - less need for pattern matching that way. This is Burda 07/2015 #115, which I made just a few weeks ago from another cotton sateen. It's a simple pattern and easy to wear, so is a winner in my books.
I was really disappointed in the quality of this fabric. This cotton sateen from Nerida Hansen is quite thin and more like cotton lawn or poplin to me, which actually is quite perfect for this style of dress. I've since discovered that the term 'sateen' refers to the weave and shine, and not the fabric weight, it's just that cotton sateen I've purchased from other stores are quite thick and stretchy that can be used for tailored pants and jackets etc which this fabric definitely could not.
However what I most disappointed about was that this fabric was printed quite off grain which made it even more difficult to pattern match. At first I thought it might just be that the tight weave at the selvage might be causing the stripes to skew, because it was mainly at the edges that the stripes didn't line up. So I clipped the seams and tried to stream and stretch it straight which didn't really help.