The value of medals is what has changed, not the usefulness of Colosseum. Like, it was always useless. A pile of happy in a 6x7, a size of a town hall? Building taverns outperforms Colosseum up to level 7 if polished, and public baths need one more level to beat. I also think that happiness value has also been changed, maybe not as early as Iron, but probably in other ages you can go by with 0 happiness and boosts from StM, LoA and RAH. So, spending 1580 FPs for this husk until it will start paying for itself in the slightest? I say no. And with medals, what are 24 of them if you can pretty easily get 90 from investing in someone's Arctic Orangery level 2 with FP swaps? This is not counting Arc even, as it's from personal experience. Arc users can easily get tens of thousands of medals per GB levelup, which they get as often as several per day, so why should they waste 42 space for getting so little? Not to mention Colosseum is outperformed by any other GB that gives happiness. I'd actually grant Coloseum a small attack and/or defence bonus as passive, maybe to half of what Zeus gets to attack at the same level, without removing happiness or medals, so that those that build up heavy atk+ would have a use of it. After all, they consider getting a few +atk from the oncoming winter event with 35 space investment, surely they would go a long way to use 42 of Colosseum if it would grant em 15%.