I'd agree that the UB isn't badly placed at all. In fact, it's perfect!
You adopt HR to pop off the happy caps everywhere. You build the Aqueduct and get the food on top so that your city size is then only limited by health, which is boosted because your civ is Expansive! Together with early Granaries, that's a recipe for massive populations very fast, helped along by extra food from the Baray.