The Dany snap was explained by directors etc. As stated, she had wanted to go psycho before and been talked out of it. She then had the realisation that there was no love for her, Jon couldn’t return her love so all she had left to rule with was fear.
Then she had the moment when she parked the dragon and was looking at the red keep, everything came flooding back, her family had built it, everything had been taken away from her by these people, etc etc , full retard beserker mode activated.
I liked the overall theme of the episode, the kinda bleakness from un needed slaughter, but wasn’t overly impressed with the things that others have already mentioned.
Bring on next week so we can see what happens…