Suggestion on the Mayans

It wasn’t nerfed because it was too strong in castle age, it was nerfed because it was broken OP in feudal age where you could just go archers and raze the entire enemy base. It was so strong that it was the only reliable way to counter the OP Cuman.

Anyway if you start trying and interpreting the dev decisions, then here is one for you: initially obsidian arrows only gave +4 against normal buildings, and they were latter buffed to give +6. Also there was a bug that prevented this bonus from applying to the stone wall armour class too. Did the devs thought the tech was strong enough and renounced to this bonus or decided to fix the bug and buff the tech? Spoilers: they chose the latter.