it wasn't an fmv so the player would personally feel the poignance of killing their aeons off themselves. And plus, it'd be switching between prerendered and real time back and forth so you could pick with aeon.
I found lady Yunalesca to be somewhat easy. Fighting Seymour on Gagazet was hell until i figured out the really easy way to be him.
When you can do everything, the hardest part is doing anything.
For those who play XI, Katsushiro: Bahamut Server