Erratic changes in facial expression and soundtrack giving an uneasy feeling, are you guys fucking serious?
Look, I get how it might happen in the books. There we had four full chapters dealing with the fallout of her abandoning Mereen. A whole arc of the series was supposed to be about the Dothraki invasion of Westeros and its fallout. We'll have fake Aegon probably sitting on the throne instead of Cersei, and an insight into Daenerys mind about another contender to the throne that wasn't conveyed in television. This is even a problem in the books already, where the main characters conflicts and motivations are rarely internalized, making them sort of pathetic compared to the Shakesperean tragic heroes Martin evidently inspires himself on. It was just blown to large proportions in the show and rushed headalong with the idiot plot.
Besides, there's nothing so far that has been shown to be particularly unusual and/or cruel from any of the main characters in the series. In the books, Jon threatens to have babies thrown into the fire, and Tyrion dreams about raping her sister's corpse. Daenerys, on the other hand, is fairly tame compared to most medieval rulers during warfare. Even more so in the context of the ASOIAF setting and specially Essos, where every European cliché of how Asia was violent and sensual and exotic was thrown together. Just look at what the civilized Venetians or Turks did to Constantinople. Or what happened to a lot of German towns during the Wars of Apostasy later on.
Suddenly, though, we are to believe that rapist wannabe Tyrion, Varys (the man who thought Aerys and Joffrey were OK to merit his services), Arya (who baked her enemies into pies) etc. think maybe their ruler going Gengis Khan once in the one city they all hated is mad and going too far. All of that, again, in a sudden bout of 21st century morality and conscience of war crimes that were inaccessible to the brightest medieval thinkers.