Likewise, I don't think anyone needs regular residential buildings, regular production buildings, regular cultural buildings, or regular decorations. The premium buildings of those types are not bad prizes. For example, today, my Daily Challenge reward is a "Workman's Chest", giving me a 10% chance of a Premium Production Building. A 50% chance of a normal production building, and a 40% chance of some supplies. I can build normal production buildings myself. I don't need them as a prize. So it's really only a 10% chance of a prize that really means anything at all.
It's like a real-world contest where the prize is a glass of water. I can get a glass of water myself if I want one. There's no incentive to enter such a contest. I might enter a contest to win a bottle of expensive wine - something that I normally wouldn't buy for myself.
Premium Roads might be a good prize as well, but so far, there are no prize chests that give roads.