Why is Atomium so bad? Sure, it's better than SN, but it's still horrible. I would rather build a Frau 3 ages back and get better benefits, including more happiness per square relative to level, and significantly more goods per day. Say whatever you would like about Atomium being immune to the dumb Refined Goods Rule, I would rather get goods delivered to me and then I decide to pay guild dividends. Don't decide where MY goods are going for me. I am the boss of my own city, especially when the building in question is as big as the town hall.
I would be only fine with the observatory, because it's only 9 squares and it's SPECIFICALLY designed to be a guild support building.