I love your mod, I am not bad at building but when it comes to playing harder difficulties I just can't find the effort to build anything that looks nice, however I suggest also including specific buildings, such as a building that houses all your crafting tools, this could be balanced by only having pre-hard mode building tools available to build or purchase before the wall has been defeated, and a new building is available to buy with the Titanium or adam forge, or the Mythril or Orical anvil etc.

Perhaps other specialised buildings could be an pre-organised chest storage room, or a trophy room for bosses and an alchemy/planter box building.

Thank you