As you can see on the screenshots, Warhuts and Noble huts get ridiculous stats with the dance, once you sent in most building upgrades and have a full community plaza with 10 war priests and 15 villagers. Other boni get capped as well and so should this one (the walls don’t get a buff at all for some reason).
It’s already been nerfed because it no longer effects walls, it’s just a meme strat and regular artillery deals with it well, mortars make it a non issue.