Absolutely not. I'd sooner forgive Eunhwa for being an unrepentant cunt or even Crow for what she did to our adorable little masochist Yuni.

What Red Shoes did was treasonous, and had more far reaching effects beyond the mental torture she inflicted on the Old Tales gals, particularly Cinderella. Her research into making the Corruption code more potent was straight fucked (the kidnapping, torture and brain surgery is just plain insane), and I think overall, she touched, damaged, and ended far more lives than Crow with her terrorism.

In short, Red Shoes can get fucked with a thousand cactuses in every orifice and I'm glad Cinderella killed her and left her ass on the floor of the lab. It's better than she deserved.