I decided to take off the ruched trim on the overskirt. I didn't plan ahead for it, and I couldn't figure out how to manage it with the pleats without completely taking the whole thing apart. I added Ruched trim on the sleeves, all along the neckline and down the front. The only things left to do are finish the hooks and eyes and a few other fiddly bits.
The white linen flounces with Venise lace trim are detachable!
As for the trim on the sleeves, I'm still not sold. Any other ideas out there that might help to disguise the fact that the sleeves are pieced together at the elbow with an extension?