Couple thoughts on Early Buildings to share.
Carpenter: When I designed this, I wanted to make an early building that would give you a step up in production. However, what I've been experiencing is that Carpenter is not such a great build until the city that has it is generating enough hammers for the Carpenter to provide a bonus. I don't really want to push the bonus up too much, so I was thinking about giving Carpenter +50% faster production of Wheelwright. Wheelwright is not a great build when it becomes available but is pretty good in the late Ancient Era; it really needs Chariotry and Trade to make it valuable, and I think giving Carpenter a bonus to produce Wheelwright would make it be worth building early on. Also, this mimics Treadmill Crane's +50% production of Castle and Construction Firm's +50% production of Skyscraper.
Fish Traps and Fisherman's Hut: These two buildings do practically the same thing: give you a food bonus in a city with seafood resources nearby. I don't like buildings that do this, and the circumstances are such that just about any city that can build one can also build the other. The exceptions are a city with only Whale in its vicinity gets Fisherman's Hut but not Fish Traps, and a city built on a river, but not on a coast, but still having Fish or Crabs or Shrimp in its vicinity can build Fish Traps but not Fisherman's Hut. These are both pretty narrow sets of circumstances. I think we should either eliminate Fish Traps completely or move Fisherman's Hut up to Sailing and make it an upgrade of the Traps. This is admittedly a very early upgrade so I'm not sure how really practical it is. Let me know what you would prefer doing.