The new stonehenge is terrible, I totally agree, and having it locked to piety makes it even worse. Imo the old stonehenge was one of the weakest earlygame-wonders, and now moving it to a worse tech, nerfing the yields and locking it to a policytree. Another point of worry is also how it will affect the pietytree, I mean all the policylocked wonders don't really need to be exactly the same power but there really is no way this new stonehenge can compare with Hanging gardens or even the pyramids. I mean the pyramids are considered a pretty weak wonder, but atleast it gives you a permanent unique bonus(workerspeed) that is actually useful the entire game(kinda, assuming you expand) while the lasting bonus on the stonehenge is compareable to a temple. I'm fine with nerfing the petra, I mean I usually build it just for the extra traderoute. While letting it buff floodplains makes it really powerful in some situations. Also this improves our ability to balance out other desertaffecting things without having to worry about it being overpowered when combined with petra.