"Kelly, I claim no particular expertise in Cinderella, my experience being limited to watching the three R&H TV versions, the Disney movie and now this Broadway production. (I saw some of these a good while ago and so my memories of them have probably faded.) This production, especially Laura's portrayal of Cinderella, is the only one that has brought me to tears. It was quite special. "
The qualities you listed as being unique to DCB and Laura's characterization of Cinderella and that you presumably find to be the strong points of the character are all elements that have been present in the story since the beginning of time. Cinderella, whatever name she is called in various retellings, has always been forgiving, altruistic, and strong, none of that was created for this particular production. That's the point I was making, since you said: "Laura brings qualities of strength, altruism, forgiveness and a touch of humor to the role of Cinderella that are new to that character." And I would argue there is a lot of humor to be found in the Perrault telling, the Grimms' version, and plenty more in modern interpretations like Into the Woods and Ever After, which do not pre-date R&H's Cinderella, but certainly pre-date this latest version which owes a debt to them.
I am of the mind that the best performances are the ones that are unexpected and surprising in some way. Patina Miller, whether you agree or disagree with her interpretation of the Leading Player, took a role that everyone knows inside and out and that has been done iconically by Ben Vereen and twisted it completely on its head. A much more difficult feat than simply channeling one's inner princess.
"Get mad, then get over it." - Colin Powell