This Marlborough is made out of the same "I am gorgeous" fabric /I love the rainbow part of it/ my very first Marlborough bra was made of. Unlike the first one, I didn't line the cups - the lace is just lace /no silk organza below it/ and the lower cup is not lined either. I was unsure how it will look and feel if I skip the second layer and thus allow more stretch. It is OK. It sews faster and holds as good as the lined one /or even better as it is thinner and more breathable/.
I appliqued lace next to the back closure. Again. It is not a styling decision actually. It is a trick to get the fit improved in no time and with added visual interest. This is a DD cup bra and the off shoulder strap is not something rare here. So by adding lace mainly to reduce the back elasticity around center back. Thus the back part of the strap is staying closer to the back center with no pattern piece alternation. Another great thing about this method is the fact, the tiniest little scraps of lace go in the bra, not in the bin.
If you decide to give it a try, machine applique is done on the back pieces before the elastics are attached. You can do it later too but it will take longer to stitch it by hand.
This bra was made in a hurry and the inside look shows the result. Not only it was a limited time project. but it was really dark sewing session too, so I accidentally skipped/misplaced a few stitches along the casing and whip stitched them by hand. It holds nice. This would never be the case if it was an off-size bra.