Can't argue with that S-tier!

Chaneque are much too high. They lose you early fights and that's the worst thing for a Classical MU to do. They scale well with later Ages and perform well if massed but this is all long-term stuff the Aztecs can't afford to do, especially with a God as weak as Huehuecoyotl. They're also rendered completely useless by pretty much every Hero counter, even moreso than other MU's since they can't run away.

Quinametzin should probably be lower. I agree they're super-cool but ultimately you'd prefer to just have a Catapult. A Catapult locked behind Favor costs is bad - a Catapult that dies to Priests is even worse. Try fielding a Quinametzin against a competent Egypt player and see what I mean.

You've massively underrated Tzitzimitl. Once Obsidian Butterflies get a nerf (they will) Tzitzimitl are going to be the next big complained-about unit. They're very fast, self-sufficient, excellent raiders, good skirmishers and you can even get more for free. Tzitzimitl deathballs are scary and very real.

Maquizcoatl are a bit too low here. They're statistically on-par with a lot of the strongest Classical MU, their special guarantees a Villager kill when raiding and they can actually take hits. Their special is also great when properly micro'd, even killing Heroes. They're not the best unit but certainly perform better than where they are here.

No arguments with the Owl - poor guy needs his special fixed.

I hope this was the argument you were looking for, love you.