Stick a fork in me, I'm done.
McCall's 6396 would be easier and give you an everyday item, not just a formal item.
This is what this dress reminds me of. Love that Little Pony version on the right, btw.
So this pinned version is where I left off.
I steamed the skirt like a sauna, but those folds just came right back.
After a day of thinking and rethinking, I stitched down the draped skirt to the short base skirt.
Double stitched at the big triangular drop
Yanked the bondsuit top over it and pinned it down.
I had to add fabric at the sides to expand the top to cover the skirt. The crotch extensions for the bodysuit were barely enough.
I did not have to carve off the sleeves to fill the side gaps.
This is overexposed, but you can see the pleats in this.
The front and the back are the same, with four basic pleats
Okay, this is not a great diagram but you get the idea. The big  pleat combines with the  to its right side. There's a LOT of fabric in that center. I tried moving the volume out to the sides, and it just didn't give the same shape as the original.
The top of the big central pleat is covered a little; I had to pull it up otherwise the hem dragged on the floor.
At this point, to finish, I would stitch the top to the skirt and remove the parts of the underskirt that aren't sewn to the overskirt and the top.
Now, you're asking yourself: is she going to finish this?
And I don't think so.
I don't need this dress. The folks who were initially interested in a final version have changed their minds. I would have to build a new bodice and I don't know to what end that would be.
So I'm going to pull the bodice off, and save the skirt. It may yet find a job. But right now, it's just a noble lab sample.
Did I learn a lot? Yes. Was it fun? Yeah.
And now it's time to stop.
Because it's almost time to show off
THE BURLESQUE COSTUMES!!!!!!!