Dude, I watched the scene. You can’t wish cast a major piece of equipment into a show that has one season left, which they are dividing into two.
The TV version of the Kingsmoot was a simplified version of the book Kingsmoot, Victarion/Yara/Asha merger withstanding.
How would you cinematically demonstrate mind control? Unless your debate premise is Dragonbinder isn’t an enslavement/mind control device, I don’t see how anyone who read the books could justify a bunch of people nodding for Yara and then instantaneously supporting Euron.