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It was kino. AZ served as a foil to Lysandre, being his ancestor, and only coming to terms after witnessing his descendant make the same mistakes that he did all those years ago.
The game builds up to it without being overbearing. Lysandre's goals were perfectly justified through interactions like at Lumiose and Parfum Palace, the player is constantly being coerced into tipping be it at the cafes or scary house, and even after Lysandre is defeated, the player has to deal with the repercussions of the world they defended by witnessing the Pokemon Village being full of abandoned and abused Pokemon and later the slums of Lumiose with Emma and her friends being literal homeless children. AZ has lived through war, and witnessed the coming and going of humanity afterwards up until the point where Lysandre goes nuclear. To top it off, Floette coming back after he finally realizes that there can be good in humanity is concluded with the first and currently only vocal song the series.
The concept of Infinity Energy being introduced was one of the greatest time for lorefags on /vp/. There's a reason we all died out after Sun and Moon which was seemingly going to expand on these concepts but didn't deliver.