The pleats at the center back seam and side seam were left open until I had the lower edge of the bodice completed to make sure everything would match up, although I did baste the center back seam allowances under to keep them out of the way.
The skirt pieces clearly extend higher than the waistline and the bodice extends over the hipline. The extra skirt length was my insurance policy in case all of those bodice points went wrong . . . I figured that I could always salvage the dress by cutting it at the actual waistline. Fortunately, that was not necessary!
Keeping a petticoat on the dressform while I was playing around with my muslin and the actual dress as it was being constructed was incredibly helpful - I am not sure why I have waited so long to try that!
And that is the skirt!