Jan 10
Lumber is too hard & Bricks need tweaking
Lumber used to be the most expensive T2 material and with flax seeds it just became worse - even considering the addition of brick molds.
Lumber should require less flax oil and there should be a low-output alternative recipe for flax oil that can be cooked up on an iron stove or something.
Nobody is building with lumber now - some people are turning to using glass to make T2 rooms since it's the cheapest option. Bricks should be the cheapest - we've been using mud bricks as a building material since before 7,000 BC and more modern fired bricks since 4,500 BC.
You could have pottery with 2 recipes for bricks - one for "Mud Bricks" that uses clay in a simple mortared reusable granite mold in low quantities and a "Fired Brick" that uses clay and shale in the style of mold you added recently but in much higher quantities. They would both be fired in a kiln or a pottery station of some sort.
Pending
Its also important to note most servers are going to have wood all used up in the early game, wood just becomes so calorie intensive because you have to commute long distances for it and none of the seeds have grown long enough to be harvested yet. Worlds should spawn with a higher tree density to help balance out lumbers cost.