I see what you’re both saying, but her taking her dragons after Cersei isn’t going to make her a villain to me. Cersei has provoked it. She brought human shields into the Red Keep. Dany just nuking innocents is completely out of character and that is what she has to do next week to be the bad guy to the point that Jon, Tyrion, etc turn on her. I really hope that’s not that plan, because again, it isn’t earned and is out of character.
If they wanted to make Dany the bad guy you keep Missandei as a prisoner and have Dany burn her anyway. Once Cersei cuts off her head I’m rooting for Dany to torch her.