@Bodgeitandscarper, yes you can cut the front up and down too. Dupioni doesn’t have a nap, so there is no problem. Which view are you going to make? As it’s not a style you’d wear open, you could use substitutes for the facing and a false hem...
ETA: Looking at the pattern again, it says ‘unlined’. Have a look at the facings, they might be huge. You could line it either all the way to the edge, or make narrow facings and line it. Mark down the button/buttonhole position carefully and stabilise it and sew the button on with a small back-button. I’d use sew-in interfacing - a densely woven cotton is my usually favourite.