So, I feel like wonders are an almost useless building. They cost a lot, are usually too big to place anywhere, and provide little return on your investment , so to speak. I have come up with a few ways to make them more interesting outside of capture the wonder mode:
#1: Merge the Glorious Expansion technology into the Wonder, to save the excessive resources spent on it.
#2: Give Wonders an aura that improves movement speed, gather rate, and melee damage (either global or localized).
#3: Make Wonders acts as more powerful civic centers that can’t train units or attack.