we’re not going to get a super dark and gritty show like Arcane

That's fine. The balance is part of the charm.

I think fans forget how 'immature' ATLA is on the surface, too. Like, its a lot of silly kid jokes with cartoon sound effects to go with it. Darker implications often don't hit unless you squint and already know the lore. Seven Havens could totally hit that same tone and make leadership feel that they got a kids show.

EDIT: But yeah, I am keeping my expectations... open.