I think Sara looks great. True, she is skinny, but I think that may just be her natural body type. I have seen her in person many times, especially lately, and she looks fine to me.
As for Lucie, she does not look at all like Muriel should. Lets hope that this was just a tacky choice to change at curtain call, and that they do not choose to do some new spin on Muriel.
"The hallmark of aristocracy is responsibility. Oh brother, that got me, that did me in!"