I disagree with this purely because Dany always had a "moral" reason for killing people, either out of revenge, judgement of them being bad people or because they directly disrespected her, This moral code of not harming innocent people which was ingrained in all the issues with the slavers has vanished in 1 day due to the death of Missandre. If when the bells range she had flown to the keep and burned the hell out of Cersei that is fair enough. However systematically burning the entirety of Kings Landing killing hundreds of thousands doesn't sit right. Her entire story is freeing people, wanting to avoid the madness of her ancestors, wanting to rule (I assume) living people. She went from a 3 to an 11 on the madness scale and it's too much. I get they have to make her proper nutjob so Jon realises he has to kill her but other than her looking a bit tired at Dragonstone there isn't enough of an arc. Maybe someone just needs to give her a snickers.