Plenty of ball gowns do ruched. The Mariel does it without shouting, which is what black tie dresses for women so often get wrong. Chiffon carries the ruching without stiffening, so the shape stays soft while it holds.
Two things to knowruffle detailing kept quiet, and a full ball skirt in chiffon.
The shape leads and the finish follows. Make the Mariel the one they remember.
