"In this episode everyone faced their demons
The theme throughout this entire episode was succumbing to your demons, this wasn't just about Dany's madness, the coin flip landed for every character on the board
-Cerci to her arrogance -Jamie to his love for Cerci -Sandor to his desire for revenge -Qyburn to his monster ala Frankenstein -Euron to his arrogance -Tyrion to his love for his family -Dany to her madness
Jon and Arya were also tested, Jon with his loyalty and Arya with her desire for revenge and their antithesis characters were greyworm and the hound. They represent the alternate path they could have chosen. Greyworm and Jon were faced with exactly the same choice at the same time just as Arya and the Hound were. Greyworm chose his loyalty to dany whereas Jon defied his loyalty to do the right thing, Arya chose to live rather than succumb to revenge as the hound did. All in all this episode was heavy with theme and I loved it for it.
Also another thing to note is that those who adapted against their demons survived. Arya and Jon did not succumb to theirs and they survived whereas the others who gave in died. I'm assuming Grey worm and Daenerys won't have a good time next episode."
Stolen from Reddit: (you need an account to see links)
I thought that was a very interesting take on the episode